diff --git a/src/logic/scripting/lua/LuaState.cpp b/src/logic/scripting/lua/LuaState.cpp
index 524e3049..0d70a378 100644
--- a/src/logic/scripting/lua/LuaState.cpp
+++ b/src/logic/scripting/lua/LuaState.cpp
@@ -21,11 +21,11 @@ namespace scripting {
 luaerror::luaerror(const std::string& message) : std::runtime_error(message) {
 }
 
-void LuaState::removeLibFuncs(const char* libname, const char* funcs[]) {
-    if (getglobal(libname)) {
+void LuaState::removeLibFuncs(lua_State* L, const char* libname, const char* funcs[]) {
+    if (getglobal(L, libname)) {
         for (uint i = 0; funcs[i]; i++) {
-            pushnil();
-            setfield(funcs[i], -2);
+            lua_pushnil(L);
+            setfield(L, funcs[i], -2);
         }
     }
 }
@@ -34,10 +34,11 @@ LuaState::LuaState() {
     logger.info() << LUA_VERSION;
     logger.info() << LUAJIT_VERSION;
 
-    L = luaL_newstate();
+    auto L = luaL_newstate();
     if (L == nullptr) {
         throw luaerror("could not to initialize Lua");
     }
+    mainThread = L;
     // Allowed standard libraries
     luaopen_base(L);
     luaopen_math(L);
@@ -57,15 +58,15 @@ LuaState::LuaState() {
         "tmpname",
         nullptr
     };
-    removeLibFuncs("os", removed_os);
+    removeLibFuncs(L, "os", removed_os);
 
-    createLibs();
+    createLibs(L);
 
-    lua_pushvalue(L, LUA_GLOBALSINDEX);
-    setglobal(envName(0));
+    pushglobals(L);
+    setglobal(L, envName(0));
 
     lua_createtable(L, 0, 0);
-    setglobal(LAMBDAS_TABLE);
+    setglobal(L, LAMBDAS_TABLE);
 }
 
 std::string LuaState::envName(int env) {
@@ -73,42 +74,15 @@ std::string LuaState::envName(int env) {
 }
 
 LuaState::~LuaState() {
-    lua_close(L);
+    lua_close(mainThread);
 }
 
-void LuaState::logError(const std::string& text) {
-    logger.error() << text;
-}
-
-void LuaState::addfunc(const std::string& name, lua_CFunction func) {
+void LuaState::addfunc(lua_State* L, const std::string& name, lua_CFunction func) {
     lua_pushcfunction(L, func);
     lua_setglobal(L, name.c_str());
 }
 
-bool LuaState::getglobal(const std::string& name) {
-    lua_getglobal(L, name.c_str());
-    if (lua_isnil(L, lua_gettop(L))) {
-        lua_pop(L, lua_gettop(L));
-        return false;
-    }
-    return true;
-}
-
-bool LuaState::hasglobal(const std::string& name) {
-    lua_getglobal(L, name.c_str());
-    if (lua_isnil(L, lua_gettop(L))) {
-        lua_pop(L, lua_gettop(L));
-        return false;
-    }
-    lua_pop(L, lua_gettop(L));
-    return true;
-}
-
-void LuaState::setglobal(const std::string& name) {
-    lua_setglobal(L, name.c_str());
-}
-
-bool LuaState::rename(const std::string& from, const std::string& to) {
+bool LuaState::rename(lua_State* L, const std::string& from, const std::string& to) {
     const char* src = from.c_str();
     lua_getglobal(L, src);
     if (lua_isnil(L, lua_gettop(L))) {
@@ -123,262 +97,65 @@ bool LuaState::rename(const std::string& from, const std::string& to) {
     return true;
 }
 
-void LuaState::remove(const std::string& name) {
+void LuaState::remove(lua_State* L, const std::string& name) {
     lua_pushnil(L);
     lua_setglobal(L, name.c_str());
 }
 
-void LuaState::createLibs() {
-    openlib("audio", audiolib);
-    openlib("block", blocklib);
-    openlib("console", consolelib);
-    openlib("core", corelib);
-    openlib("file", filelib);
-    openlib("gui", guilib);
-    openlib("input", inputlib);
-    openlib("inventory", inventorylib);
-    openlib("item", itemlib);
-    openlib("json", jsonlib);
-    openlib("pack", packlib);
-    openlib("player", playerlib);
-    openlib("time", timelib);
-    openlib("toml", tomllib);
-    openlib("world", worldlib);
+void LuaState::createLibs(lua_State* L) {
+    openlib(L, "audio", audiolib);
+    openlib(L, "block", blocklib);
+    openlib(L, "console", consolelib);
+    openlib(L, "core", corelib);
+    openlib(L, "file", filelib);
+    openlib(L, "gui", guilib);
+    openlib(L, "input", inputlib);
+    openlib(L, "inventory", inventorylib);
+    openlib(L, "item", itemlib);
+    openlib(L, "json", jsonlib);
+    openlib(L, "pack", packlib);
+    openlib(L, "player", playerlib);
+    openlib(L, "time", timelib);
+    openlib(L, "toml", tomllib);
+    openlib(L, "world", worldlib);
 
-    addfunc("print", lua_wrap_errors<l_print>);
+    addfunc(L, "print", lua_wrap_errors<l_print>);
 }
 
-void LuaState::loadbuffer(int env, const std::string& src, const std::string& file) {
+void LuaState::loadbuffer(lua_State* L, int env, const std::string& src, const std::string& file) {
     if (luaL_loadbuffer(L, src.c_str(), src.length(), file.c_str())) {
         throw luaerror(lua_tostring(L, -1));
     }
-    if (env && getglobal(envName(env))) {
+    if (env && getglobal(L, envName(env))) {
         lua_setfenv(L, -2);
     }
 }
 
-int LuaState::call(int argc, int nresults) {
-    if (lua_pcall(L, argc, nresults, 0)) {
-        throw luaerror(lua_tostring(L, -1));
-    }
-    return 1;
-}
-
-int LuaState::callNoThrow(int argc) {
-    if (lua_pcall(L, argc, LUA_MULTRET, 0)) {
-        logError(lua_tostring(L, -1));
-        return 0;
-    }
-    return 1;
-}
-
-int LuaState::eval(int env, const std::string& src, const std::string& file) {
+int LuaState::eval(lua_State* L, int env, const std::string& src, const std::string& file) {
     auto srcText = "return "+src;
-    loadbuffer(env, srcText, file);
-    return call(0);
+    loadbuffer(L, env, srcText, file);
+    return call(L, 0);
 }
 
-int LuaState::execute(int env, const std::string& src, const std::string& file) {
-    loadbuffer(env, src, file);
-    return callNoThrow(0);
+int LuaState::execute(lua_State* L, int env, const std::string& src, const std::string& file) {
+    loadbuffer(L, env, src, file);
+    return callNoThrow(L, 0);
 }
 
-int LuaState::gettop() const {
-    return lua_gettop(L);
-}
-
-int LuaState::pushinteger(lua_Integer x) {
-    lua_pushinteger(L, x);
-    return 1;
-}
-
-int LuaState::pushnumber(lua_Number x) {
-    lua_pushnumber(L, x);
-    return 1;
-}
-
-int LuaState::pushboolean(bool x) {
-    lua_pushboolean(L, x);
-    return 1;
-}
-
-int LuaState::pushivec3(lua_Integer x, lua_Integer y, lua_Integer z) {
-    lua::pushivec3(L, x, y, z);
-    return 3;
-}
-
-int LuaState::pushstring(const std::string& str) {
-    lua_pushstring(L, str.c_str());
-    return 1;
-}
-
-int LuaState::pushenv(int env) {
-    if (getglobal(envName(env))) {
+int LuaState::pushenv(lua_State* L, int env) {
+    if (getglobal(L, envName(env))) {
         return 1;
     }
     return 0;
 }
 
-int LuaState::pushvalue(int idx) {
-    lua_pushvalue(L, idx);
-    return 1;
-}
-
-int LuaState::pushvalue(const dynamic::Value& value) {
-    using namespace dynamic;
-
-    if (auto* flag = std::get_if<bool>(&value)) {
-        pushboolean(*flag);
-    } else if (auto* num = std::get_if<integer_t>(&value)) {
-        pushinteger(*num);
-    } else if (auto* num = std::get_if<number_t>(&value)) {
-        pushnumber(*num);
-    } else if (auto* str = std::get_if<std::string>(&value)) {
-        pushstring(str->c_str());
-    } else if (auto listptr = std::get_if<List_sptr>(&value)) {
-        auto list = *listptr;
-        lua_createtable(L, list->size(), 0);
-        for (size_t i = 0; i < list->size(); i++) {
-            pushvalue(list->get(i));
-            lua_rawseti(L, -2, i+1);
-        }
-    } else if (auto mapptr = std::get_if<Map_sptr>(&value)) {
-        auto map = *mapptr;
-        lua_createtable(L, 0, map->size());
-        for (auto& entry : map->values) {
-            pushvalue(entry.second);
-            lua_setfield(L, -2, entry.first.c_str());
-        }
-    } else {
-        pushnil();
-    }
-    return 1;
-}
-
-int LuaState::pushglobals() {
-    lua_pushvalue(L, LUA_GLOBALSINDEX);
-    return 1;
-}
-
-int LuaState::pushcfunction(lua_CFunction function) {
-    lua_pushcfunction(L, function);
-    return 1;
-}
-
-void LuaState::pop(int n) {
-    lua_pop(L, n);
-}
-
-int LuaState::pushnil() {
-    lua_pushnil(L);
-    return 1;
-}
-
-bool LuaState::getfield(const std::string& name, int idx) {
-    lua_getfield(L, idx, name.c_str());
-    if (lua_isnil(L, -1)) {
-        lua_pop(L, -1);
-        return false;
-    }
-    return true;
-}
-
-void LuaState::setfield(const std::string& name, int idx) {
-    lua_setfield(L, idx, name.c_str());
-}
-
-bool LuaState::toboolean(int idx) {
-    return lua_toboolean(L, idx);
-}
-
-lua_Integer LuaState::tointeger(int idx) {
-    return lua_tointeger(L, idx);
-}
-
-lua_Number LuaState::tonumber(int idx) {
-    return lua_tonumber(L, idx);
-}
-
-glm::vec2 LuaState::tovec2(int idx) {
-    return lua::tovec2(L, idx);
-}
-
-glm::vec4 LuaState::tocolor(int idx) {
-    return lua::tocolor(L, idx);
-}
-
-const char* LuaState::tostring(int idx) {
-    return lua_tostring(L, idx);
-}
-
-dynamic::Value LuaState::tovalue(int idx) {
-    using namespace dynamic;
-    auto type = lua_type(L, idx);
-    switch (type) {
-        case LUA_TNIL:
-        case LUA_TNONE:
-            return dynamic::NONE;
-        case LUA_TBOOLEAN:
-            return lua_toboolean(L, idx) == 1;
-        case LUA_TNUMBER: {
-            auto number = lua_tonumber(L, idx);
-            auto integer = lua_tointeger(L, idx);
-            if (number == (lua_Number)integer) {
-                return integer;
-            } else {
-                return number;
-            }
-        }
-        case LUA_TSTRING:
-            return std::string(lua_tostring(L, idx));
-        case LUA_TTABLE: {
-            int len = lua_objlen(L, idx);
-            if (len) {
-                // array
-                auto list = create_list();
-                for (int i = 1; i <= len; i++) {
-                    lua_rawgeti(L, idx, i);
-                    list->put(tovalue(-1));
-                    lua_pop(L, 1);
-                }
-                return list;
-            } else {
-                // table
-                auto map = create_map();
-                lua_pushvalue(L, idx);
-                lua_pushnil(L);
-                while (lua_next(L, -2)) {
-                    lua_pushvalue(L, -2);
-                    auto key = lua_tostring(L, -1);
-                    map->put(key, tovalue(-2));
-                    lua_pop(L, 2);
-                }
-                lua_pop(L, 1);
-                return map;
-            }
-        }
-        default:
-            throw std::runtime_error(
-                "lua type "+std::string(luaL_typename(L, type))+" is not supported"
-            );
-    }
-}
-
-bool LuaState::isstring(int idx) {
-    return lua_isstring(L, idx);
-}
-
-bool LuaState::isfunction(int idx) {
-    return lua_isfunction(L, idx);
-}
-
-void LuaState::openlib(const std::string& name, const luaL_Reg* libfuncs) {
+void LuaState::openlib(lua_State* L, const std::string& name, const luaL_Reg* libfuncs) {
     lua_newtable(L);
     luaL_setfuncs(L, libfuncs, 0);
     lua_setglobal(L, name.c_str());
 }
 
-std::shared_ptr<std::string> LuaState::createLambdaHandler() {
+std::shared_ptr<std::string> LuaState::createLambdaHandler(lua_State* L) {
     auto ptr = reinterpret_cast<ptrdiff_t>(lua_topointer(L, -1));
     auto name = util::mangleid(ptr);
     lua_getglobal(L, LAMBDAS_TABLE.c_str());
@@ -395,40 +172,33 @@ std::shared_ptr<std::string> LuaState::createLambdaHandler() {
     });
 }
 
-runnable LuaState::createRunnable() {
-    auto funcptr = createLambdaHandler();
+runnable LuaState::createRunnable(lua_State* L) {
+    auto funcptr = createLambdaHandler(L);
     return [=]() {
         lua_getglobal(L, LAMBDAS_TABLE.c_str());
         lua_getfield(L, -1, funcptr->c_str());
-        callNoThrow(0);
+        callNoThrow(L, 0);
     };
 }
 
-scripting::common_func LuaState::createLambda() {
-    auto funcptr = createLambdaHandler();
+scripting::common_func LuaState::createLambda(lua_State* L) {
+    auto funcptr = createLambdaHandler(L);
     return [=](const std::vector<dynamic::Value>& args) {
         lua_getglobal(L, LAMBDAS_TABLE.c_str());
         lua_getfield(L, -1, funcptr->c_str());
         for (const auto& arg : args) {
-            pushvalue(arg);
+            pushvalue(L, arg);
         }
-        if (call(args.size(), 1)) {
-            auto result = tovalue(-1);
-            pop(1);
+        if (call(L, args.size(), 1)) {
+            auto result = tovalue(L, -1);
+            lua_pop(L, 1);
             return result;
         }
         return dynamic::Value(dynamic::NONE);
     };
 }
 
-const char* LuaState::requireString(int idx) {
-    if (!lua_isstring(L, idx)) {
-        throw luaerror("string expected at "+std::to_string(idx));
-    }
-    return lua_tostring(L, idx);
-}
-
-int LuaState::createEnvironment(int parent) {
+int LuaState::createEnvironment(lua_State* L, int parent) {
     int id = nextEnvironment++;
 
     // local env = {}
@@ -439,7 +209,7 @@ int LuaState::createEnvironment(int parent) {
     if (parent == 0) {
         lua_pushvalue(L, LUA_GLOBALSINDEX);
     } else {
-        if (pushenv(parent) == 0) {
+        if (pushenv(L, parent) == 0) {
             lua_pushvalue(L, LUA_GLOBALSINDEX);
         }
     }
@@ -447,43 +217,43 @@ int LuaState::createEnvironment(int parent) {
     lua_setmetatable(L, -2);
 
     // envname = env
-    setglobal(envName(id));
+    setglobal(L, envName(id));
     return id;
 }
 
 
-void LuaState::removeEnvironment(int id) {
+void LuaState::removeEnvironment(lua_State* L, int id) {
     if (id == 0) {
         return;
     }
     lua_pushnil(L);
-    setglobal(envName(id));
+    setglobal(L, envName(id));
 }
 
-bool LuaState::emit_event(const std::string &name, std::function<int(LuaState *)> args) {
-    getglobal("events");
-    getfield("emit");
-    pushstring(name);
-    callNoThrow(args(this) + 1);
-    bool result = toboolean(-1);
-    pop(2);
+bool LuaState::emitEvent(lua_State* L, const std::string &name, std::function<int(lua_State*)> args) {
+    getglobal(L, "events");
+    getfield(L, "emit");
+    lua::pushstring(L, name);
+    callNoThrow(L, args(L) + 1);
+    bool result = lua_toboolean(L, -1);
+    lua_pop(L, 2);
     return result;
 }
 
 
-void LuaState::dumpStack() {
-    int top = gettop();
+void LuaState::dumpStack(lua_State* L) {
+    int top = lua_gettop(L);
     for (int i = 1; i <= top; i++) {
         std::cout << std::setw(3) << i << std::setw(20) << luaL_typename(L, i) << std::setw(30);
         switch (lua_type(L, i)) {
             case LUA_TNUMBER:
-                std::cout << tonumber(i);
+                std::cout << lua_tonumber(L, i);
                 break;
             case LUA_TSTRING:
-                std::cout << tostring(i);
+                std::cout << lua_tostring(L, i);
                 break;
             case LUA_TBOOLEAN:
-                std::cout << (toboolean(i) ? "true" : "false");
+                std::cout << (lua_toboolean(L, i) ? "true" : "false");
                 break;
             case LUA_TNIL:
                 std::cout << "nil";
@@ -496,6 +266,6 @@ void LuaState::dumpStack() {
     }
 }
 
-lua_State* LuaState::getLua() const {
-    return L;
+lua_State* LuaState::getMainThread() const {
+    return mainThread;
 }
diff --git a/src/logic/scripting/lua/LuaState.hpp b/src/logic/scripting/lua/LuaState.hpp
index 74c0257d..f8a925e5 100644
--- a/src/logic/scripting/lua/LuaState.hpp
+++ b/src/logic/scripting/lua/LuaState.hpp
@@ -17,65 +17,35 @@ namespace lua {
     };
 
     class LuaState {
-        lua_State* L;
+        lua_State* mainThread;
+
         int nextEnvironment = 1;
 
-        void logError(const std::string& text);
-        void removeLibFuncs(const char* libname, const char* funcs[]);
-        void createLibs();
+        void removeLibFuncs(lua_State*, const char* libname, const char* funcs[]);
+        void createLibs(lua_State* L);
 
-        std::shared_ptr<std::string> createLambdaHandler();
+        std::shared_ptr<std::string> createLambdaHandler(lua_State*);
     public:
         LuaState();
         ~LuaState();
 
         static std::string envName(int env);
-        void loadbuffer(int env, const std::string& src, const std::string& file);
-        int gettop() const;
-        int pushivec3(lua_Integer x, lua_Integer y, lua_Integer z);
-        int pushinteger(lua_Integer x);
-        int pushnumber(lua_Number x);
-        int pushboolean(bool x);
-        int pushstring(const std::string& str);
-        int pushenv(int env);
-        int pushvalue(int idx);
-        int pushvalue(const dynamic::Value& value);
-        int pushnil();
-        int pushglobals();
-        int pushcfunction(lua_CFunction function);
-        void pop(int n=1);
-        bool getfield(const std::string& name, int idx = -1);
-        void setfield(const std::string& name, int idx = -2);
-        bool toboolean(int idx);
-        lua_Integer tointeger(int idx);
-        lua_Number tonumber(int idx);
-        glm::vec2 tovec2(int idx);
-        glm::vec4 tocolor(int idx);
-        dynamic::Value tovalue(int idx);
-        const char* tostring(int idx);
-        bool isstring(int idx);
-        bool isfunction(int idx);
-        int call(int argc, int nresults=-1);
-        int callNoThrow(int argc);
-        int execute(int env, const std::string& src, const std::string& file="<string>");
-        int eval(int env, const std::string& src, const std::string& file="<eval>");
-        void openlib(const std::string& name, const luaL_Reg* libfuncs);
-        void addfunc(const std::string& name, lua_CFunction func);
-        bool getglobal(const std::string& name);
-        void setglobal(const std::string& name);
-        bool hasglobal(const std::string& name);
-        bool rename(const std::string& from, const std::string& to);
-        void remove(const std::string& name);;
-        runnable createRunnable();
-        scripting::common_func createLambda();
+        void loadbuffer(lua_State*, int env, const std::string& src, const std::string& file);
+        int pushenv(lua_State*, int env);
+        int execute(lua_State*, int env, const std::string& src, const std::string& file="<string>");
+        int eval(lua_State*, int env, const std::string& src, const std::string& file="<eval>");
+        void openlib(lua_State*, const std::string& name, const luaL_Reg* libfuncs);
+        void addfunc(lua_State*, const std::string& name, lua_CFunction func);
+        bool rename(lua_State*, const std::string& from, const std::string& to);
+        void remove(lua_State*, const std::string& name);;
+        runnable createRunnable(lua_State*);
+        scripting::common_func createLambda(lua_State*);
 
-        const char* requireString(int idx);
-
-        int createEnvironment(int parent);
-        void removeEnvironment(int id);
-        bool emit_event(const std::string& name, std::function<int(lua::LuaState*)> args=[](auto*){return 0;});
-        void dumpStack();
-        lua_State* getLua() const;
+        int createEnvironment(lua_State*, int parent);
+        void removeEnvironment(lua_State*, int id);
+        bool emitEvent(lua_State*, const std::string& name, std::function<int(lua_State*)> args=[](auto*){return 0;});
+        void dumpStack(lua_State*);
+        lua_State* getMainThread() const;
     };
 }
 
diff --git a/src/logic/scripting/lua/libconsole.cpp b/src/logic/scripting/lua/libconsole.cpp
index 88238f65..0a27bcde 100644
--- a/src/logic/scripting/lua/libconsole.cpp
+++ b/src/logic/scripting/lua/libconsole.cpp
@@ -1,5 +1,6 @@
 #include "api_lua.hpp"
 #include "lua_commons.hpp"
+#include "lua_util.hpp"
 #include "LuaState.hpp"
 
 #include "../scripting.hpp"
@@ -17,10 +18,10 @@ static int l_add_command(lua_State* L) {
     if (!lua_isfunction(L, 3)) {
         throw std::runtime_error("invalid callback");
     }
-    auto scheme = state->requireString(1);
-    auto description = state->requireString(2);
+    auto scheme = lua::require_string(L, 1);
+    auto description = lua::require_string(L, 2);
     lua_pushvalue(L, 3);
-    auto func = state->createLambda();
+    auto func = state->createLambda(L);
     try {
         engine->getCommandsInterpreter()->getRepository()->add(
             scheme, description, [func](auto, auto args, auto kwargs) {
@@ -33,16 +34,16 @@ static int l_add_command(lua_State* L) {
     return 0;
 }
 
-static int l_execute(lua_State*) {
-    auto prompt = state->requireString(1);
+static int l_execute(lua_State* L) {
+    auto prompt = lua::require_string(L, 1);
     auto result = engine->getCommandsInterpreter()->execute(prompt);
-    state->pushvalue(result);
+    lua::pushvalue(L, result);
     return 1;
 }
 
-static int l_set(lua_State*) {
-    auto name = state->requireString(1);
-    auto value = state->tovalue(2);
+static int l_set(lua_State* L) {
+    auto name = lua::require_string(L, 1);
+    auto value = lua::tovalue(L, 2);
     (*engine->getCommandsInterpreter())[name] = value;
     return 0;
 }
@@ -62,7 +63,7 @@ static int l_get_commands_list(lua_State* L) {
 }
 
 static int l_get_command_info(lua_State* L) {
-    auto name = state->requireString(1);
+    auto name = lua::require_string(L, 1);
     auto interpreter = engine->getCommandsInterpreter();
     auto repo = interpreter->getRepository();
     auto command = repo->get(name);
diff --git a/src/logic/scripting/lua/libcore.cpp b/src/logic/scripting/lua/libcore.cpp
index 068c8824..48003a7d 100644
--- a/src/logic/scripting/lua/libcore.cpp
+++ b/src/logic/scripting/lua/libcore.cpp
@@ -1,4 +1,5 @@
 #include "lua_commons.hpp"
+#include "lua_util.hpp"
 #include "api_lua.hpp"
 #include "LuaState.hpp"
 
@@ -21,48 +22,49 @@
 namespace scripting {
     extern lua::LuaState* state;
 }
+using namespace scripting;
 
 static int l_new_world(lua_State* L) {
-    auto name = lua_tostring(L, 1);
-    auto seed = lua_tostring(L, 2);
-    auto generator = lua_tostring(L, 3);
-    auto controller = scripting::engine->getController();
+    auto name = lua::require_string(L, 1);
+    auto seed = lua::require_string(L, 2);
+    auto generator = lua::require_string(L, 3);
+    auto controller = engine->getController();
     controller->createWorld(name, seed, generator);
     return 0;
 }
 
 static int l_open_world(lua_State* L) {
-    auto name = lua_tostring(L, 1);
+    auto name = lua::require_string(L, 1);
 
-    auto controller = scripting::engine->getController();
+    auto controller = engine->getController();
     controller->openWorld(name, false);
     return 0;
 }
 
 static int l_reopen_world(lua_State*) {
-    auto controller = scripting::engine->getController();
-    controller->reopenWorld(scripting::level->getWorld());
+    auto controller = engine->getController();
+    controller->reopenWorld(level->getWorld());
     return 0;
 }
 
 static int l_close_world(lua_State* L) {
-    if (scripting::controller == nullptr) {
+    if (controller == nullptr) {
         throw std::runtime_error("no world open");
     }
     bool save_world = lua_toboolean(L, 1);
     if (save_world) {
-        scripting::controller->saveWorld();
+        controller->saveWorld();
     }
     // destroy LevelScreen and run quit callbacks
-    scripting::engine->setScreen(nullptr);
+    engine->setScreen(nullptr);
     // create and go to menu screen
-    scripting::engine->setScreen(std::make_shared<MenuScreen>(scripting::engine));
+    engine->setScreen(std::make_shared<MenuScreen>(engine));
     return 0;
 }
 
 static int l_delete_world(lua_State* L) {
-    auto name = lua_tostring(L, 1);
-    auto controller = scripting::engine->getController();
+    auto name = lua::require_string(L, 1);
+    auto controller = engine->getController();
     controller->deleteWorld(name);
     return 0;
 }
@@ -95,35 +97,35 @@ static int l_reconfig_packs(lua_State* L) {
         remPacks.emplace_back(lua_tostring(L, -1));
         lua_pop(L, 1);
     }
-    auto controller = scripting::engine->getController();
-    controller->reconfigPacks(scripting::controller, addPacks, remPacks);
+    auto engine_controller = engine->getController();
+    engine_controller->reconfigPacks(controller, addPacks, remPacks);
     return 0;
 }
 
 static int l_get_setting(lua_State* L) {
-    auto name = lua_tostring(L, 1);
-    const auto value = scripting::engine->getSettingsHandler().getValue(name);
-    scripting::state->pushvalue(value);
+    auto name = lua::require_string(L, 1);
+    const auto value = engine->getSettingsHandler().getValue(name);
+    lua::pushvalue(L, value);
     return 1;
 }
 
 static int l_set_setting(lua_State* L) {
-    auto name = lua_tostring(L, 1);
-    const auto value = scripting::state->tovalue(2);
-    scripting::engine->getSettingsHandler().setValue(name, value);
+    auto name = lua::require_string(L, 1);
+    const auto value = lua::tovalue(L, 2);
+    engine->getSettingsHandler().setValue(name, value);
     return 0;
 }
 
 static int l_str_setting(lua_State* L) {
-    auto name = lua_tostring(L, 1);
-    const auto string = scripting::engine->getSettingsHandler().toString(name);
-    scripting::state->pushstring(string);
+    auto name = lua::require_string(L, 1);
+    const auto string = engine->getSettingsHandler().toString(name);
+    lua::pushstring(L, string);
     return 1;
 }
 
 static int l_get_setting_info(lua_State* L) {
-    auto name = lua_tostring(L, 1);
-    auto setting = scripting::engine->getSettingsHandler().getSetting(name);
+    auto name = lua::require_string(L, 1);
+    auto setting = engine->getSettingsHandler().getSetting(name);
     lua_createtable(L, 0, 1);
     if (auto number = dynamic_cast<NumberSetting*>(setting)) {
         lua_pushnumber(L, number->getMin());
diff --git a/src/logic/scripting/lua/libfile.cpp b/src/logic/scripting/lua/libfile.cpp
index ecea4c23..85336add 100644
--- a/src/logic/scripting/lua/libfile.cpp
+++ b/src/logic/scripting/lua/libfile.cpp
@@ -1,4 +1,5 @@
 #include "lua_commons.hpp"
+#include "lua_util.hpp"
 #include "api_lua.hpp"
 #include "LuaState.hpp"
 #include "../scripting.hpp"
@@ -31,7 +32,7 @@ static fs::path resolve_path_soft(const std::string& path) {
 }
 
 static int l_file_find(lua_State* L) {
-    std::string path = state->requireString(1);
+    auto path = lua::require_string(L, 1);
     try {
         lua_pushstring(L, engine->getResPaths()->findRaw(path).c_str());
         return 1;
@@ -41,13 +42,13 @@ static int l_file_find(lua_State* L) {
 }
 
 static int l_file_resolve(lua_State* L) {
-    fs::path path = resolve_path(state->requireString(1));
+    fs::path path = resolve_path(lua::require_string(L, 1));
     lua_pushstring(L, path.u8string().c_str());
     return 1;
 }
 
 static int l_file_read(lua_State* L) {
-    fs::path path = resolve_path(state->requireString(1));
+    fs::path path = resolve_path(lua::require_string(L, 1));
     if (fs::is_regular_file(path)) {
         lua_pushstring(L, files::read_string(path).c_str());
         return 1;
@@ -55,50 +56,50 @@ static int l_file_read(lua_State* L) {
     throw std::runtime_error("file does not exists "+util::quote(path.u8string()));
 }
 
-static int l_file_write(lua_State*) {
-    fs::path path = resolve_path(state->requireString(1));
-    auto text = state->requireString(2);
+static int l_file_write(lua_State* L) {
+    fs::path path = resolve_path(lua::require_string(L, 1));
+    std::string text = lua::require_string(L, 2);
     files::write_string(path, text);
     return 1;    
 }
 
-static int l_file_remove(lua_State*) {
-    std::string rawpath = state->requireString(1);
+static int l_file_remove(lua_State* L) {
+    std::string rawpath = lua::require_string(L, 1);
     fs::path path = resolve_path(rawpath);
     auto entryPoint = rawpath.substr(0, rawpath.find(':'));
     if (entryPoint != "world") {
         throw std::runtime_error("access denied");
     }
-    return state->pushboolean(fs::remove(path));
+    return lua::pushboolean(L, fs::remove(path));
 }
 
-static int l_file_remove_tree(lua_State*) {
-    std::string rawpath = state->requireString(1);
+static int l_file_remove_tree(lua_State* L) {
+    std::string rawpath = lua::require_string(L, 1);
     fs::path path = resolve_path(rawpath);
     auto entryPoint = rawpath.substr(0, rawpath.find(':'));
     if (entryPoint != "world") {
         throw std::runtime_error("access denied");
     }
-    return state->pushinteger(fs::remove_all(path));
+    return lua::pushinteger(L, fs::remove_all(path));
 }
 
-static int l_file_exists(lua_State*) {
-    fs::path path = resolve_path_soft(state->requireString(1));
-    return state->pushboolean(fs::exists(path));
+static int l_file_exists(lua_State* L) {
+    fs::path path = resolve_path_soft(lua::require_string(L, 1));
+    return lua::pushboolean(L, fs::exists(path));
 }
 
-static int l_file_isfile(lua_State*) {
-    fs::path path = resolve_path_soft(state->requireString(1));
-    return state->pushboolean(fs::is_regular_file(path));
+static int l_file_isfile(lua_State* L) {
+    fs::path path = resolve_path_soft(lua::require_string(L, 1));
+    return lua::pushboolean(L, fs::is_regular_file(path));
 }
 
-static int l_file_isdir(lua_State*) {
-    fs::path path = resolve_path_soft(state->requireString(1));
-    return state->pushboolean(fs::is_directory(path));
+static int l_file_isdir(lua_State* L) {
+    fs::path path = resolve_path_soft(lua::require_string(L, 1));
+    return lua::pushboolean(L, fs::is_directory(path));
 }
 
 static int l_file_length(lua_State* L) {
-    fs::path path = resolve_path(state->requireString(1));
+    fs::path path = resolve_path(lua::require_string(L, 1));
     if (fs::exists(path)){
         lua_pushinteger(L, fs::file_size(path));
     } else {
@@ -108,19 +109,17 @@ static int l_file_length(lua_State* L) {
 }
 
 static int l_file_mkdir(lua_State* L) {
-    fs::path path = resolve_path(state->requireString(1));
-    lua_pushboolean(L, fs::create_directory(path));
-    return 1;    
+    fs::path path = resolve_path(lua::require_string(L, 1));
+    return lua::pushboolean(L, fs::create_directory(path));  
 }
 
 static int l_file_mkdirs(lua_State* L) {
-    fs::path path = resolve_path(state->requireString(1));
-    lua_pushboolean(L, fs::create_directories(path));
-    return 1;    
+    fs::path path = resolve_path(lua::require_string(L, 1));
+    return lua::pushboolean(L, fs::create_directories(path)); 
 }
 
 static int l_file_read_bytes(lua_State* L) {
-    fs::path path = resolve_path(state->requireString(1));
+    fs::path path = resolve_path(lua::require_string(L, 1));
     if (fs::is_regular_file(path)) {
         size_t length = static_cast<size_t>(fs::file_size(path));
 
@@ -162,7 +161,7 @@ static int l_file_write_bytes(lua_State* L) {
         throw std::runtime_error("string expected");
     }
 
-    fs::path path = resolve_path(state->requireString(pathIndex));
+    fs::path path = resolve_path(lua::require_string(L, pathIndex));
 
     std::vector<ubyte> bytes;
 
@@ -171,8 +170,7 @@ static int l_file_write_bytes(lua_State* L) {
     if(result != 1) {
         return result;
     } else {
-        lua_pushboolean(L, files::write_bytes(path, bytes.data(), bytes.size()));
-        return 1;
+        return lua::pushboolean(L, files::write_bytes(path, bytes.data(), bytes.size()));
     }
 }
 
@@ -187,7 +185,7 @@ static int l_file_list_all_res(lua_State* L, const std::string& path) {
 }
 
 static int l_file_list(lua_State* L) {
-    std::string dirname = state->requireString(1);
+    std::string dirname = lua::require_string(L, 1);
     if (dirname.find(':') == std::string::npos) {
         return l_file_list_all_res(L, dirname);
     }
@@ -208,7 +206,7 @@ static int l_file_list(lua_State* L) {
 }
 
 static int l_file_gzip_compress(lua_State* L) { 
-    fs::path path = resolve_path(state->requireString(1)); 
+    fs::path path = resolve_path(lua::require_string(L, 1)); 
     if (fs::is_regular_file(path)) { 
         size_t length = static_cast<size_t>(fs::file_size(path));
 
@@ -221,7 +219,7 @@ static int l_file_gzip_compress(lua_State* L) {
 }
 
 static int l_file_gzip_decompress(lua_State* L) { 
-    fs::path path = resolve_path(state->requireString(1)); 
+    fs::path path = resolve_path(lua::require_string(L, 1)); 
     if (fs::is_regular_file(path)) { 
         size_t length = static_cast<size_t>(fs::file_size(path));
 
diff --git a/src/logic/scripting/lua/libgui.cpp b/src/logic/scripting/lua/libgui.cpp
index 13e9102a..e89b1046 100644
--- a/src/logic/scripting/lua/libgui.cpp
+++ b/src/logic/scripting/lua/libgui.cpp
@@ -50,8 +50,8 @@ static DocumentNode getDocumentNode(lua_State*, const std::string& name, const s
 static DocumentNode getDocumentNode(lua_State* L, int idx=1) {
     lua_getfield(L, idx, "docname");
     lua_getfield(L, idx, "name");
-    auto docname = state->requireString(-2);
-    auto name = state->requireString(-1);
+    auto docname = lua::require_string(L, -2);
+    auto name = lua::require_string(L, -1);
     auto node = getDocumentNode(L, docname, name);
     lua_pop(L, 2);
     return node;
@@ -74,7 +74,7 @@ static int l_menu_reset(lua_State* L) {
 static int l_textbox_paste(lua_State* L) {
     auto node = getDocumentNode(L);
     auto box = dynamic_cast<TextBox*>(node.node.get());
-    auto text = state->requireString(2);
+    auto text = lua::require_string(L, 2);
     box->paste(util::str2wstr_utf8(text));
     return 0;
 }
@@ -82,7 +82,7 @@ static int l_textbox_paste(lua_State* L) {
 static int l_container_add(lua_State* L) {
     auto docnode = getDocumentNode(L);
     auto node = dynamic_cast<Container*>(docnode.node.get());
-    auto xmlsrc = state->requireString(2);
+    auto xmlsrc = lua::require_string(L, 2);
     try {
         auto subnode = guiutil::create(xmlsrc, docnode.document->getEnvironment());
         node->add(subnode);
@@ -115,10 +115,10 @@ static int l_container_clear(lua_State* L) {
 
 static int l_container_set_interval(lua_State* L) {
     auto node = getDocumentNode(L, 1);
-    auto interval = state->tointeger(2) / 1000.0f;
+    auto interval = lua_tointeger(L, 2) / 1000.0f;
     if (auto container = std::dynamic_pointer_cast<Container>(node.node)) {
-        state->pushvalue(3);
-        auto runnable = state->createRunnable();
+        lua_pushvalue(L, 3);
+        auto runnable = state->createRunnable(L);
         container->listenInterval(interval, runnable);
     }
     return 0;
@@ -131,212 +131,212 @@ static int l_move_into(lua_State* L) {
     return 0;
 }
 
-static int p_get_inventory(UINode* node) {
+static int p_get_inventory(UINode* node, lua_State* L) {
     if (auto inventory = dynamic_cast<InventoryView*>(node)) {
         auto inv = inventory->getInventory();
-        return state->pushinteger(inv ? inv->getId() : 0);
+        return lua::pushinteger(L, inv ? inv->getId() : 0);
     }
     return 0;
 }
 
-static int p_get_reset(UINode* node) {
+static int p_get_reset(UINode* node, lua_State* L) {
     if (dynamic_cast<Menu*>(node)) {
-        return state->pushcfunction(l_menu_reset);
+        return lua::pushcfunction(L, l_menu_reset);
     }
     return 0;
 }
 
-static int p_get_back(UINode* node) {
+static int p_get_back(UINode* node, lua_State* L) {
     if (dynamic_cast<Menu*>(node)) {
-        return state->pushcfunction(l_menu_back);
+        return lua::pushcfunction(L, l_menu_back);
     }
     return 0;
 }
 
-static int p_get_paste(UINode* node) {
+static int p_get_paste(UINode* node, lua_State* L) {
     if (dynamic_cast<TextBox*>(node)) {
-        return state->pushcfunction(l_textbox_paste);
+        return lua::pushcfunction(L, l_textbox_paste);
     }
     return 0;
 }
 
-static int p_get_page(UINode* node) {
+static int p_get_page(UINode* node, lua_State* L) {
     if (auto menu = dynamic_cast<Menu*>(node)) {
-        return state->pushstring(menu->getCurrent().name);
+        return lua::pushstring(L, menu->getCurrent().name);
     }
     return 0;
 }
 
-static int p_is_checked(UINode* node) {
+static int p_is_checked(UINode* node, lua_State* L) {
     if (auto box = dynamic_cast<CheckBox*>(node)) {
-        return state->pushboolean(box->isChecked());
+        return lua::pushboolean(L, box->isChecked());
     } else if (auto box = dynamic_cast<FullCheckBox*>(node)) {
-        return state->pushboolean(box->isChecked());
+        return lua::pushboolean(L, box->isChecked());
     }
     return 0;
 }
 
-static int p_get_value(UINode* node) {
+static int p_get_value(UINode* node, lua_State* L) {
     if (auto bar = dynamic_cast<TrackBar*>(node)) {
-        return state->pushnumber(bar->getValue());
+        return lua::pushnumber(L, bar->getValue());
     }
     return 0;
 }
 
-static int p_get_min(UINode* node) {
+static int p_get_min(UINode* node, lua_State* L) {
     if (auto bar = dynamic_cast<TrackBar*>(node)) {
-        return state->pushnumber(bar->getMin());
+        return lua::pushnumber(L, bar->getMin());
     }
     return 0;
 }
 
-static int p_get_max(UINode* node) {
+static int p_get_max(UINode* node, lua_State* L) {
     if (auto bar = dynamic_cast<TrackBar*>(node)) {
-        return state->pushnumber(bar->getMax());
+        return lua::pushnumber(L, bar->getMax());
     }
     return 0;
 }
 
-static int p_get_step(UINode* node) {
+static int p_get_step(UINode* node, lua_State* L) {
     if (auto bar = dynamic_cast<TrackBar*>(node)) {
-        return state->pushnumber(bar->getStep());
+        return lua::pushnumber(L, bar->getStep());
     }
     return 0;
 }
 
-static int p_get_track_width(UINode* node) {
+static int p_get_track_width(UINode* node, lua_State* L) {
     if (auto bar = dynamic_cast<TrackBar*>(node)) {
-        return state->pushnumber(bar->getTrackWidth());
+        return lua::pushnumber(L, bar->getTrackWidth());
     }
     return 0;
 }
 
-static int p_get_track_color(UINode* node) {
+static int p_get_track_color(UINode* node, lua_State* L) {
     if (auto bar = dynamic_cast<TrackBar*>(node)) {
-        return lua::pushcolor_arr(state->getLua(), bar->getTrackColor());
+        return lua::pushcolor_arr(L, bar->getTrackColor());
     }
     return 0;
 }
 
-static int p_is_valid(UINode* node) {
+static int p_is_valid(UINode* node, lua_State* L) {
     if (auto box = dynamic_cast<TextBox*>(node)) {
-        return state->pushboolean(box->validate());
+        return lua::pushboolean(L, box->validate());
     }
     return 0;
 }
 
-static int p_get_caret(UINode* node) {
+static int p_get_caret(UINode* node, lua_State* L) {
     if (auto box = dynamic_cast<TextBox*>(node)) {
-        return state->pushinteger(static_cast<integer_t>(box->getCaret()));
+        return lua::pushinteger(L, static_cast<integer_t>(box->getCaret()));
     }
     return 0;
 }
 
-static int p_get_placeholder(UINode* node) {
+static int p_get_placeholder(UINode* node, lua_State* L) {
     if (auto box = dynamic_cast<TextBox*>(node)) {
-        return state->pushstring(util::wstr2str_utf8(box->getPlaceholder()));
+        return lua::pushwstring(L, box->getPlaceholder());
     }
     return 0;
 }
 
-static int p_get_text(UINode* node) {
+static int p_get_text(UINode* node, lua_State* L) {
     if (auto button = dynamic_cast<Button*>(node)) {
-        return state->pushstring(util::wstr2str_utf8(button->getText()));
+        return lua::pushwstring(L, button->getText());
     } else if (auto label = dynamic_cast<Label*>(node)) {
-        return state->pushstring(util::wstr2str_utf8(label->getText()));
+        return lua::pushwstring(L, label->getText());
     } else if (auto box = dynamic_cast<TextBox*>(node)) {
-        return state->pushstring(util::wstr2str_utf8(box->getText()));
+        return lua::pushwstring(L, box->getText());
     }
     return 0;
 }
 
-static int p_get_editable(UINode* node) {
+static int p_get_editable(UINode* node, lua_State* L) {
     if (auto box = dynamic_cast<TextBox*>(node)) {
-        return state->pushboolean(box->isEditable());
+        return lua::pushboolean(L, box->isEditable());
     }
     return 0;
 }
 
-static int p_get_src(UINode* node) {
+static int p_get_src(UINode* node, lua_State* L) {
     if (auto image = dynamic_cast<Image*>(node)) {
-        return state->pushstring(image->getTexture());
+        return lua::pushstring(L, image->getTexture());
     }
     return 0;
 }
 
-static int p_get_add(UINode* node) {
+static int p_get_add(UINode* node, lua_State* L) {
     if (dynamic_cast<Container*>(node)) {
-        return state->pushcfunction(lua_wrap_errors<l_container_add>);
+        return lua::pushcfunction(L, lua_wrap_errors<l_container_add>);
     }
     return 0;
 }
 
-static int p_get_destruct(UINode*) {
-    return state->pushcfunction(lua_wrap_errors<l_node_destruct>);
+static int p_get_destruct(UINode*, lua_State* L) {
+    return lua::pushcfunction(L, lua_wrap_errors<l_node_destruct>);
 }
 
-static int p_get_clear(UINode* node) {
+static int p_get_clear(UINode* node, lua_State* L) {
     if (dynamic_cast<Container*>(node)) {
-        return state->pushcfunction(lua_wrap_errors<l_container_clear>);
+        return lua::pushcfunction(L, lua_wrap_errors<l_container_clear>);
     }
     return 0;
 }
 
-static int p_set_interval(UINode* node) {
+static int p_set_interval(UINode* node, lua_State* L) {
     if (dynamic_cast<Container*>(node)) {
-        return state->pushcfunction(lua_wrap_errors<l_container_set_interval>);
+        return lua::pushcfunction(L, lua_wrap_errors<l_container_set_interval>);
     }
     return 0;
 }
 
-static int p_get_color(UINode* node) {
-    return lua::pushcolor_arr(state->getLua(), node->getColor());
+static int p_get_color(UINode* node, lua_State* L) {
+    return lua::pushcolor_arr(L, node->getColor());
 }
-static int p_get_hover_color(UINode* node) {
-    return lua::pushcolor_arr(state->getLua(), node->getHoverColor());
+static int p_get_hover_color(UINode* node, lua_State* L) {
+    return lua::pushcolor_arr(L, node->getHoverColor());
 }
-static int p_get_pressed_color(UINode* node) {
-    return lua::pushcolor_arr(state->getLua(), node->getPressedColor());
+static int p_get_pressed_color(UINode* node, lua_State* L) {
+    return lua::pushcolor_arr(L, node->getPressedColor());
 }
-static int p_get_tooltip(UINode* node) {
-    return state->pushstring(util::wstr2str_utf8(node->getTooltip()));
+static int p_get_tooltip(UINode* node, lua_State* L) {
+    return lua::pushwstring(L, node->getTooltip());
 }
-static int p_get_tooltip_delay(UINode* node) {
-    return state->pushnumber(node->getTooltipDelay());
+static int p_get_tooltip_delay(UINode* node, lua_State* L) {
+    return lua::pushnumber(L, node->getTooltipDelay());
 }
-static int p_get_pos(UINode* node) {
-    return lua::pushvec2_arr(state->getLua(), node->getPos());
+static int p_get_pos(UINode* node, lua_State* L) {
+    return lua::pushvec2_arr(L, node->getPos());
 }
-static int p_get_wpos(UINode* node) {
-    return lua::pushvec2_arr(state->getLua(), node->calcPos());
+static int p_get_wpos(UINode* node, lua_State* L) {
+    return lua::pushvec2_arr(L, node->calcPos());
 }
-static int p_get_size(UINode* node) {
-    return lua::pushvec2_arr(state->getLua(), node->getSize());
+static int p_get_size(UINode* node, lua_State* L) {
+    return lua::pushvec2_arr(L, node->getSize());
 }
-static int p_is_interactive(UINode* node) {
-    return state->pushboolean(node->isInteractive());
+static int p_is_interactive(UINode* node, lua_State* L) {
+    return lua::pushboolean(L, node->isInteractive());
 }
-static int p_is_visible(UINode* node) {
-    return state->pushboolean(node->isVisible());
+static int p_is_visible(UINode* node, lua_State* L) {
+    return lua::pushboolean(L, node->isVisible());
 }
-static int p_is_enabled(UINode* node) {
-    return state->pushboolean(node->isEnabled());
+static int p_is_enabled(UINode* node, lua_State* L) {
+    return lua::pushboolean(L, node->isEnabled());
 }
-static int p_move_into(UINode*) {
-    return state->pushcfunction(l_move_into);
+static int p_move_into(UINode*, lua_State* L) {
+    return lua::pushcfunction(L, l_move_into);
 }
-static int p_get_focused(UINode* node) {
-    return state->pushboolean(node->isFocused());
+static int p_get_focused(UINode* node, lua_State* L) {
+    return lua::pushboolean(L, node->isFocused());
 }
 
 static int l_gui_getattr(lua_State* L) {
-    auto docname = state->requireString(1);
-    auto element = state->requireString(2);
-    auto attr = state->requireString(3);
+    auto docname = lua::require_string(L, 1);
+    auto element = lua::require_string(L, 2);
+    auto attr = lua::require_string(L, 3);
     auto docnode = getDocumentNode(L, docname, element);
     auto node = docnode.node;
 
-    static const std::unordered_map<std::string_view, std::function<int(UINode*)>> getters {
+    static const std::unordered_map<std::string_view, std::function<int(UINode*,lua_State*)>> getters {
         {"color", p_get_color},
         {"hoverColor", p_get_hover_color},
         {"pressedColor", p_get_pressed_color},
@@ -375,118 +375,118 @@ static int l_gui_getattr(lua_State* L) {
     };
     auto func = getters.find(attr);
     if (func != getters.end()) {
-        return func->second(node.get());
+        return func->second(node.get(), L);
     }
     return 0;
 }
 
-static void p_set_color(UINode* node, int idx) {
-    node->setColor(state->tocolor(idx));
+static void p_set_color(UINode* node, lua_State* L, int idx) {
+    node->setColor(lua::tocolor(L, idx));
 }
-static void p_set_hover_color(UINode* node, int idx) {
-    node->setHoverColor(state->tocolor(idx));
+static void p_set_hover_color(UINode* node, lua_State* L, int idx) {
+    node->setHoverColor(lua::tocolor(L, idx));
 }
-static void p_set_pressed_color(UINode* node, int idx) {
-    node->setPressedColor(state->tocolor(idx));
+static void p_set_pressed_color(UINode* node, lua_State* L, int idx) {
+    node->setPressedColor(lua::tocolor(L, idx));
 }
-static void p_set_tooltip(UINode* node, int idx) {
-    node->setTooltip(util::str2wstr_utf8(state->requireString(idx)));
+static void p_set_tooltip(UINode* node, lua_State* L, int idx) {
+    node->setTooltip(lua::require_wstring(L, idx));
 }
-static void p_set_tooltip_delay(UINode* node, int idx) {
-    node->setTooltipDelay(state->tonumber(idx));
+static void p_set_tooltip_delay(UINode* node, lua_State* L, int idx) {
+    node->setTooltipDelay(lua_tonumber(L, idx));
 }
-static void p_set_pos(UINode* node, int idx) {
-    node->setPos(state->tovec2(idx));
+static void p_set_pos(UINode* node, lua_State* L, int idx) {
+    node->setPos(lua::tovec2(L, idx));
 }
-static void p_set_wpos(UINode* node, int idx) {
-    node->setPos(state->tovec2(idx)-node->calcPos());
+static void p_set_wpos(UINode* node, lua_State* L, int idx) {
+    node->setPos(lua::tovec2(L, idx)-node->calcPos());
 }
-static void p_set_size(UINode* node, int idx) {
-    node->setSize(state->tovec2(idx));
+static void p_set_size(UINode* node, lua_State* L, int idx) {
+    node->setSize(lua::tovec2(L, idx));
 }
-static void p_set_interactive(UINode* node, int idx) {
-    node->setInteractive(state->toboolean(idx));
+static void p_set_interactive(UINode* node, lua_State* L, int idx) {
+    node->setInteractive(lua_toboolean(L, idx));
 }
-static void p_set_visible(UINode* node, int idx) {
-    node->setVisible(state->toboolean(idx));
+static void p_set_visible(UINode* node, lua_State* L, int idx) {
+    node->setVisible(lua_toboolean(L, idx));
 }
-static void p_set_enabled(UINode* node, int idx) {
-    node->setEnabled(state->toboolean(idx));
+static void p_set_enabled(UINode* node, lua_State* L, int idx) {
+    node->setEnabled(lua_toboolean(L, idx));
 }
-static void p_set_placeholder(UINode* node, int idx) {
+static void p_set_placeholder(UINode* node, lua_State* L, int idx) {
     if (auto box = dynamic_cast<TextBox*>(node)) {
-        box->setPlaceholder(util::str2wstr_utf8(state->requireString(idx)));
+        box->setPlaceholder(lua::require_wstring(L, idx));
     }
 }
-static void p_set_text(UINode* node, int idx) {
+static void p_set_text(UINode* node, lua_State* L, int idx) {
     if (auto label = dynamic_cast<Label*>(node)) {
-        label->setText(util::str2wstr_utf8(state->requireString(idx)));
+        label->setText(lua::require_wstring(L, idx));
     } else if (auto button = dynamic_cast<Button*>(node)) {
-        button->setText(util::str2wstr_utf8(state->requireString(idx)));
+        button->setText(lua::require_wstring(L, idx));
     } else if (auto box = dynamic_cast<TextBox*>(node)) {
-        box->setText(util::str2wstr_utf8(state->requireString(idx)));
+        box->setText(lua::require_wstring(L, idx));
     }
 }
-static void p_set_caret(UINode* node, int idx) {
+static void p_set_caret(UINode* node, lua_State* L, int idx) {
     if (auto box = dynamic_cast<TextBox*>(node)) {
-        box->setCaret(static_cast<ptrdiff_t>(state->tointeger(idx)));
+        box->setCaret(static_cast<ptrdiff_t>(lua_tointeger(L, idx)));
     }
 }
-static void p_set_editable(UINode* node, int idx) {
+static void p_set_editable(UINode* node, lua_State* L, int idx) {
     if (auto box = dynamic_cast<TextBox*>(node)) {
-        box->setEditable(state->toboolean(idx));
+        box->setEditable(lua_toboolean(L, idx));
     }
 }
-static void p_set_src(UINode* node, int idx) {
+static void p_set_src(UINode* node, lua_State* L, int idx) {
     if (auto image = dynamic_cast<Image*>(node)) {
-        image->setTexture(state->requireString(idx));
+        image->setTexture(lua::require_string(L, idx));
     }
 }
-static void p_set_value(UINode* node, int idx) {
+static void p_set_value(UINode* node, lua_State* L, int idx) {
     if (auto bar = dynamic_cast<TrackBar*>(node)) {
-        bar->setValue(state->tonumber(idx));
+        bar->setValue(lua_tonumber(L, idx));
     }
 }
-static void p_set_min(UINode* node, int idx) {
+static void p_set_min(UINode* node, lua_State* L, int idx) {
     if (auto bar = dynamic_cast<TrackBar*>(node)) {
-        bar->setMin(state->tonumber(idx));
+        bar->setMin(lua_tonumber(L, idx));
     }
 }
-static void p_set_max(UINode* node, int idx) {
+static void p_set_max(UINode* node, lua_State* L, int idx) {
     if (auto bar = dynamic_cast<TrackBar*>(node)) {
-        bar->setMax(state->tonumber(idx));
+        bar->setMax(lua_tonumber(L, idx));
     }
 }
-static void p_set_step(UINode* node, int idx) {
+static void p_set_step(UINode* node, lua_State* L, int idx) {
     if (auto bar = dynamic_cast<TrackBar*>(node)) {
-        bar->setStep(state->tonumber(idx));
+        bar->setStep(lua_tonumber(L, idx));
     }
 }
-static void p_set_track_width(UINode* node, int idx) {
+static void p_set_track_width(UINode* node, lua_State* L, int idx) {
     if (auto bar = dynamic_cast<TrackBar*>(node)) {
-        bar->setTrackWidth(state->tointeger(idx));
+        bar->setTrackWidth(lua_tointeger(L, idx));
     }
 }
-static void p_set_track_color(UINode* node, int idx) {
+static void p_set_track_color(UINode* node, lua_State* L, int idx) {
     if (auto bar = dynamic_cast<TrackBar*>(node)) {
-        bar->setTrackColor(state->tocolor(idx));
+        bar->setTrackColor(lua::tocolor(L, idx));
     }
 }
-static void p_set_checked(UINode* node, int idx) {
+static void p_set_checked(UINode* node, lua_State* L, int idx) {
     if (auto box = dynamic_cast<CheckBox*>(node)) {
-        box->setChecked(state->toboolean(idx));
+        box->setChecked(lua_toboolean(L, idx));
     } else if (auto box = dynamic_cast<FullCheckBox*>(node)) {
-        box->setChecked(state->toboolean(idx));
+        box->setChecked(lua_toboolean(L, idx));
     }
 }
-static void p_set_page(UINode* node, int idx) {
+static void p_set_page(UINode* node, lua_State* L, int idx) {
     if (auto menu = dynamic_cast<Menu*>(node)) {
-        menu->setPage(state->requireString(idx));
+        menu->setPage(lua::require_string(L, idx));
     }
 }
-static void p_set_inventory(UINode* node, int idx) {
+static void p_set_inventory(UINode* node, lua_State* L, int idx) {
     if (auto view = dynamic_cast<InventoryView*>(node)) {
-        auto inventory = level->inventories->get(state->tointeger(idx));
+        auto inventory = level->inventories->get(lua_tointeger(L, idx));
         if (inventory == nullptr) {
             view->unbind();
         } else {
@@ -494,8 +494,8 @@ static void p_set_inventory(UINode* node, int idx) {
         }
     }
 }
-static void p_set_focused(const std::shared_ptr<UINode> &node, int idx) {
-    if (state->toboolean(idx) && !node->isFocused()) {
+static void p_set_focused(const std::shared_ptr<UINode> &node, lua_State* L, int idx) {
+    if (lua_toboolean(L, idx) && !node->isFocused()) {
         scripting::engine->getGUI()->setFocus(node);
     } else if (node->isFocused()){
         node->defocus();
@@ -503,14 +503,14 @@ static void p_set_focused(const std::shared_ptr<UINode> &node, int idx) {
 }
 
 static int l_gui_setattr(lua_State* L) {
-    auto docname = state->requireString(1);
-    auto element = state->requireString(2);
-    auto attr = state->requireString(3);
+    auto docname = lua::require_string(L, 1);
+    auto element = lua::require_string(L, 2);
+    auto attr = lua::require_string(L, 3);
 
     auto docnode = getDocumentNode(L, docname, element);
     auto node = docnode.node;
 
-    static const std::unordered_map<std::string_view, std::function<void(UINode*,int)>> setters {
+    static const std::unordered_map<std::string_view, std::function<void(UINode*,lua_State*,int)>> setters {
         {"color", p_set_color},
         {"hoverColor", p_set_hover_color},
         {"pressedColor", p_set_pressed_color},
@@ -539,20 +539,20 @@ static int l_gui_setattr(lua_State* L) {
     };
     auto func = setters.find(attr);
     if (func != setters.end()) {
-        func->second(node.get(), 4);
+        func->second(node.get(), L, 4);
     }
-    static const std::unordered_map<std::string_view, std::function<void(std::shared_ptr<UINode>,int)>> setters2 {
+    static const std::unordered_map<std::string_view, std::function<void(std::shared_ptr<UINode>,lua_State*,int)>> setters2 {
         {"focused", p_set_focused},
     };
     auto func2 = setters2.find(attr);
     if (func2 != setters2.end()) {
-        func2->second(node, 4);
+        func2->second(node, L, 4);
     }
     return 0;
 }
 
 static int l_gui_get_env(lua_State* L) {
-    auto name = state->requireString(1);
+    auto name = lua::require_string(L, 1);
     auto doc = scripting::engine->getAssets()->getLayout(name);
     if (doc == nullptr) {
         throw std::runtime_error("document '"+std::string(name)+"' not found");
@@ -562,9 +562,9 @@ static int l_gui_get_env(lua_State* L) {
 }
 
 static int l_gui_str(lua_State* L) {
-    auto text = util::str2wstr_utf8(state->requireString(1));
+    auto text = lua::require_wstring(L, 1);
     if (!lua_isnoneornil(L, 2)) {
-        auto context = util::str2wstr_utf8(state->requireString(2));
+        auto context = lua::require_wstring(L, 2);
         lua_pushstring(L, util::wstr2str_utf8(langs::get(text, context)).c_str());
     } else {
         lua_pushstring(L, util::wstr2str_utf8(langs::get(text)).c_str());
@@ -573,7 +573,7 @@ static int l_gui_str(lua_State* L) {
 }
 
 static int l_gui_reindex(lua_State* L) {
-    auto name = state->requireString(1);
+    auto name = lua::require_string(L, 1);
     auto doc = scripting::engine->getAssets()->getLayout(name);
     if (doc == nullptr) {
         throw std::runtime_error("document '"+std::string(name)+"' not found");
diff --git a/src/logic/scripting/lua/libinput.cpp b/src/logic/scripting/lua/libinput.cpp
index 309cc26b..5e9413ea 100644
--- a/src/logic/scripting/lua/libinput.cpp
+++ b/src/logic/scripting/lua/libinput.cpp
@@ -16,29 +16,28 @@ namespace scripting {
     extern lua::LuaState* state;
     extern Hud* hud;
 }
-
 using namespace scripting;
 
 static int l_keycode(lua_State* L) {
-    const char* name = state->requireString(1);
+    auto name = lua::require_string(L, 1);
     lua_pushinteger(L, static_cast<int>(input_util::keycode_from(name)));
     return 1;
 }
 
 static int l_mousecode(lua_State* L) {
-    const char* name = state->requireString(1);
+    auto name = lua::require_string(L, 1);
     lua_pushinteger(L, static_cast<int>(input_util::mousecode_from(name)));
     return 1;
 }
 
-static int l_add_callback(lua_State*) {
-    auto bindname = state->requireString(1);
+static int l_add_callback(lua_State* L) {
+    auto bindname = lua::require_string(L, 1);
     const auto& bind = Events::bindings.find(bindname);
     if (bind == Events::bindings.end()) {
         throw std::runtime_error("unknown binding "+util::quote(bindname));
     }
-    state->pushvalue(2);
-    runnable actual_callback = state->createRunnable();
+    lua_pushvalue(L, 2);
+    runnable actual_callback = state->createRunnable(L);
     runnable callback = [=]() {
         if (!scripting::engine->getGUI()->isFocusCaught()) {
             actual_callback();
diff --git a/src/logic/scripting/lua/libitem.cpp b/src/logic/scripting/lua/libitem.cpp
index c8d6c11a..16d8d877 100644
--- a/src/logic/scripting/lua/libitem.cpp
+++ b/src/logic/scripting/lua/libitem.cpp
@@ -1,4 +1,5 @@
 #include "lua_commons.hpp"
+#include "lua_util.hpp"
 #include "api_lua.hpp"
 #include "LuaState.hpp"
 #include "../scripting.hpp"
@@ -8,12 +9,11 @@
 namespace scripting {
     extern lua::LuaState* state;
 }
-
 using namespace scripting;
 
 static int l_item_name(lua_State* L) {
-    auto indices = scripting::content->getIndices();
-    lua_Number id = lua_tointeger(L, 1);
+    auto indices = content->getIndices();
+    auto id = lua_tointeger(L, 1);
     if (static_cast<size_t>(id) >= indices->countItemDefs()) {
         return 0;
     }
@@ -23,15 +23,15 @@ static int l_item_name(lua_State* L) {
 }
 
 static int l_item_index(lua_State* L) {
-    auto name = scripting::state->requireString(1);
-    lua_pushinteger(L, scripting::content->requireItem(name).rt.id);
+    auto name = lua::require_string(L, 1);
+    lua_pushinteger(L, content->requireItem(name).rt.id);
     return 1;
 }
 
 static int l_item_stack_size(lua_State* L) {
-    auto indices = scripting::content->getIndices();
-    lua_Integer id = lua_tointeger(L, 1);
-    if (id < 0 || size_t(id) >= indices->countItemDefs()) {
+    auto indices = content->getIndices();
+    auto id = lua_tointeger(L, 1);
+    if (static_cast<size_t>(id) >= indices->countItemDefs()) {
         return 0;
     }
     auto def = indices->getItemDef(id);
diff --git a/src/logic/scripting/lua/libjson.cpp b/src/logic/scripting/lua/libjson.cpp
index 7d3be119..9cb316b4 100644
--- a/src/logic/scripting/lua/libjson.cpp
+++ b/src/logic/scripting/lua/libjson.cpp
@@ -1,4 +1,5 @@
 #include "api_lua.hpp"
+#include "lua_util.hpp"
 #include "lua_commons.hpp"
 #include "LuaState.hpp"
 
@@ -10,7 +11,7 @@ namespace scripting {
 }
 
 static int l_json_stringify(lua_State* L) {
-    auto value = scripting::state->tovalue(1);
+    auto value = lua::tovalue(L, 1);
 
     if (auto mapptr = std::get_if<dynamic::Map_sptr>(&value)) {
         bool nice = lua_toboolean(L, 2);
@@ -23,9 +24,9 @@ static int l_json_stringify(lua_State* L) {
 }
 
 static int l_json_parse(lua_State* L) {
-    auto string = scripting::state->requireString(1);
+    auto string = lua::require_string(L, 1);
     auto element = json::parse("<string>", string);
-    scripting::state->pushvalue(element);
+    lua::pushvalue(L, element);
     return 1;
 }
 
diff --git a/src/logic/scripting/lua/libtoml.cpp b/src/logic/scripting/lua/libtoml.cpp
index 86411d42..29348eeb 100644
--- a/src/logic/scripting/lua/libtoml.cpp
+++ b/src/logic/scripting/lua/libtoml.cpp
@@ -1,4 +1,5 @@
 #include "api_lua.hpp"
+#include "lua_util.hpp"
 #include "lua_commons.hpp"
 #include "LuaState.hpp"
 
@@ -11,7 +12,7 @@ namespace scripting {
 using namespace scripting;
 
 static int l_toml_stringify(lua_State* L) {
-    auto value = state->tovalue(1);
+    auto value = lua::tovalue(L, 1);
 
     if (auto mapptr = std::get_if<dynamic::Map_sptr>(&value)) {
         auto string = toml::stringify(**mapptr);
@@ -22,11 +23,11 @@ static int l_toml_stringify(lua_State* L) {
     }
 }
 
-static int l_toml_parse(lua_State*) {
-    auto string = state->requireString(1);
+static int l_toml_parse(lua_State* L) {
+    auto string = lua::require_string(L, 1);
     auto element = toml::parse("<string>", string);
     auto value = std::make_unique<dynamic::Value>(element);
-    state->pushvalue(*value);
+    lua::pushvalue(L, *value);
     return 1;
 }
 
diff --git a/src/logic/scripting/lua/lua_util.cpp b/src/logic/scripting/lua/lua_util.cpp
new file mode 100644
index 00000000..24cee222
--- /dev/null
+++ b/src/logic/scripting/lua/lua_util.cpp
@@ -0,0 +1,117 @@
+#include "lua_util.hpp"
+
+#include "../../../debug/Logger.hpp"
+#include "../../../util/stringutil.hpp"
+
+static debug::Logger logger("lua");
+
+int lua::pushvalue(lua_State* L, const dynamic::Value& value) {
+    using namespace dynamic;
+
+    if (auto* flag = std::get_if<bool>(&value)) {
+        lua_pushboolean(L, *flag);
+    } else if (auto* num = std::get_if<integer_t>(&value)) {
+        lua_pushinteger(L, *num);
+    } else if (auto* num = std::get_if<number_t>(&value)) {
+        lua_pushnumber(L, *num);
+    } else if (auto* str = std::get_if<std::string>(&value)) {
+        lua_pushstring(L, str->c_str());
+    } else if (auto listptr = std::get_if<List_sptr>(&value)) {
+        auto list = *listptr;
+        lua_createtable(L, list->size(), 0);
+        for (size_t i = 0; i < list->size(); i++) {
+            pushvalue(L, list->get(i));
+            lua_rawseti(L, -2, i+1);
+        }
+    } else if (auto mapptr = std::get_if<Map_sptr>(&value)) {
+        auto map = *mapptr;
+        lua_createtable(L, 0, map->size());
+        for (auto& entry : map->values) {
+            pushvalue(L, entry.second);
+            lua_setfield(L, -2, entry.first.c_str());
+        }
+    } else {
+        lua_pushnil(L);
+    }
+    return 1;
+}
+
+std::wstring lua::require_wstring(lua_State* L, int idx) {
+    return util::str2wstr_utf8(lua::require_string(L, idx));
+}
+
+int lua::pushwstring(lua_State* L, const std::wstring& str) {
+    return lua::pushstring(L, util::wstr2str_utf8(str));
+}
+
+dynamic::Value lua::tovalue(lua_State* L, int idx) {
+    using namespace dynamic;
+    auto type = lua_type(L, idx);
+    switch (type) {
+        case LUA_TNIL:
+        case LUA_TNONE:
+            return dynamic::NONE;
+        case LUA_TBOOLEAN:
+            return lua_toboolean(L, idx) == 1;
+        case LUA_TNUMBER: {
+            auto number = lua_tonumber(L, idx);
+            auto integer = lua_tointeger(L, idx);
+            if (number == (lua_Number)integer) {
+                return integer;
+            } else {
+                return number;
+            }
+        }
+        case LUA_TSTRING:
+            return std::string(lua_tostring(L, idx));
+        case LUA_TTABLE: {
+            int len = lua_objlen(L, idx);
+            if (len) {
+                // array
+                auto list = create_list();
+                for (int i = 1; i <= len; i++) {
+                    lua_rawgeti(L, idx, i);
+                    list->put(tovalue(L, -1));
+                    lua_pop(L, 1);
+                }
+                return list;
+            } else {
+                // table
+                auto map = create_map();
+                lua_pushvalue(L, idx);
+                lua_pushnil(L);
+                while (lua_next(L, -2)) {
+                    lua_pushvalue(L, -2);
+                    auto key = lua_tostring(L, -1);
+                    map->put(key, tovalue(L, -2));
+                    lua_pop(L, 2);
+                }
+                lua_pop(L, 1);
+                return map;
+            }
+        }
+        default:
+            throw std::runtime_error(
+                "lua type "+std::string(luaL_typename(L, type))+" is not supported"
+            );
+    }
+}
+
+void lua::logError(const std::string& text) {
+    logger.error() << text;
+}
+
+int lua::call(lua_State* L, int argc, int nresults) {
+    if (lua_pcall(L, argc, nresults, 0)) {
+        throw luaerror(lua_tostring(L, -1));
+    }
+    return 1;
+}
+
+int lua::callNoThrow(lua_State* L, int argc) {
+    if (lua_pcall(L, argc, LUA_MULTRET, 0)) {
+        logError(lua_tostring(L, -1));
+        return 0;
+    }
+    return 1;
+}
diff --git a/src/logic/scripting/lua/lua_util.hpp b/src/logic/scripting/lua/lua_util.hpp
index 799bd3d4..e9833c79 100644
--- a/src/logic/scripting/lua/lua_util.hpp
+++ b/src/logic/scripting/lua/lua_util.hpp
@@ -14,6 +14,23 @@
 #include <stdexcept>
 
 namespace lua {
+    // function wrappers with number of pushed values as return value
+
+    inline int pushnil(lua_State* L) {
+        lua_pushnil(L);
+        return 1;
+    }
+
+    inline int pushinteger(lua_State* L, lua_Integer x) {
+        lua_pushinteger(L, x);
+        return 1;
+    }
+
+    inline int pushnumber(lua_State* L, lua_Number x) {
+        lua_pushnumber(L, x);
+        return 1;
+    }
+
     inline int pushivec3(lua_State* L, lua_Integer x, lua_Integer y, lua_Integer z) {
         lua_pushinteger(L, x);
         lua_pushinteger(L, y);
@@ -84,7 +101,6 @@ namespace lua {
         lua_rawseti(L, -2, 4);
         return 1;
     }
-
     inline int pushcolor_arr(lua_State* L, glm::vec4 vec) {
         lua_createtable(L, 4, 0);
         lua_getglobal(L, "color_mt");
@@ -100,6 +116,33 @@ namespace lua {
         lua_rawseti(L, -2, 4);
         return 1;
     }
+    inline int pushcfunction(lua_State* L, lua_CFunction func) {
+        lua_pushcfunction(L, func);
+        return 1;
+    }
+    inline int pushstring(lua_State* L, const std::string& str) {
+        lua_pushstring(L, str.c_str());
+        return 1;
+    }
+
+    int pushwstring(lua_State* L, const std::wstring& str);
+
+    inline int pushboolean(lua_State* L, bool value) {
+        lua_pushboolean(L, value);
+        return 1;
+    }
+    inline int pushglobals(lua_State* L) {
+        lua_pushvalue(L, LUA_GLOBALSINDEX);
+        return 1;
+    }
+    inline int pushvalue(lua_State* L, int idx) {
+        lua_pushvalue(L, idx);
+        return 1;
+    }
+
+    inline bool toboolean(lua_State* L, int idx) {
+        return lua_toboolean(L, idx);
+    }
 
     inline glm::vec2 tovec2(lua_State* L, int idx) {
         lua_pushvalue(L, idx);
@@ -130,6 +173,61 @@ namespace lua {
         lua_pop(L, 1);
         return glm::vec4(r/255, g/255, b/255, a/255);
     }
+
+    inline const char* require_string(lua_State* L, int idx) {
+        if (!lua_isstring(L, idx)) {
+            throw luaerror("string expected at "+std::to_string(idx));
+        }
+        return lua_tostring(L, idx);
+    }
+
+    std::wstring require_wstring(lua_State*, int idx);
+    int pushvalue(lua_State*, const dynamic::Value& value);
+    dynamic::Value tovalue(lua_State*, int idx);
+
+    inline void pop(lua_State* L, int n=1) {
+        lua_pop(L, n);
+    }
+
+    inline bool getfield(lua_State* L, const std::string& name, int idx=-1) {
+        lua_getfield(L, idx, name.c_str());
+        if (lua_isnil(L, -1)) {
+            lua_pop(L, -1);
+            return false;
+        }
+        return true;
+    }
+
+    inline void setfield(lua_State* L, const std::string& name, int idx=-2) {
+        lua_setfield(L, idx, name.c_str());
+    }
+
+    inline bool getglobal(lua_State* L, const std::string& name) {
+        lua_getglobal(L, name.c_str());
+        if (lua_isnil(L, lua_gettop(L))) {
+            lua_pop(L, lua_gettop(L));
+            return false;
+        }
+        return true;
+    }
+
+    inline bool hasglobal(lua_State* L, const std::string& name) {
+        lua_getglobal(L, name.c_str());
+        if (lua_isnil(L, lua_gettop(L))) {
+            lua_pop(L, lua_gettop(L));
+            return false;
+        }
+        lua_pop(L, lua_gettop(L));
+        return true;
+    }
+
+    inline void setglobal(lua_State* L, const std::string& name) {
+        lua_setglobal(L, name.c_str());
+    }
+
+    void logError(const std::string& text);
+    int call(lua_State*, int argc, int nresults=-1);
+    int callNoThrow(lua_State*, int argc);
 }
 
 #endif // LOGIC_SCRIPTING_LUA_UTIL_HPP_
diff --git a/src/logic/scripting/scripting.cpp b/src/logic/scripting/scripting.cpp
index 493b6f91..18185ac7 100644
--- a/src/logic/scripting/scripting.cpp
+++ b/src/logic/scripting/scripting.cpp
@@ -17,6 +17,7 @@
 #include "../../voxels/Block.hpp"
 #include "../../world/Level.hpp"
 #include "lua/LuaState.hpp"
+#include "lua/lua_util.hpp"
 
 #include <iostream>
 #include <stdexcept>
@@ -37,12 +38,12 @@ const ContentIndices* scripting::indices = nullptr;
 BlocksController* scripting::blocks = nullptr;
 LevelController* scripting::controller = nullptr;
 
-void load_script(const fs::path& name) {
+static void load_script(const fs::path& name) {
     auto paths = scripting::engine->getPaths();
     fs::path file = paths->getResources()/fs::path("scripts")/name;
 
     std::string src = files::read_string(file);
-    state->execute(0, src, file.u8string());
+    state->execute(state->getMainThread(), 0, src, file.u8string());
 }
 
 void scripting::initialize(Engine* engine) {
@@ -59,46 +60,49 @@ scriptenv scripting::get_root_environment() {
 }
 
 scriptenv scripting::create_pack_environment(const ContentPack& pack) {
-    int id = state->createEnvironment(0);
-    state->pushenv(id);
-    state->pushvalue(-1);
-    state->setfield("PACK_ENV");
-    state->pushstring(pack.id);
-    state->setfield("PACK_ID");
-    state->pop();
+    auto L = state->getMainThread();
+    int id = state->createEnvironment(L, 0);
+    state->pushenv(L, id);
+    lua::pushvalue(L, -1);
+    lua::setfield(L, "PACK_ENV");
+    lua::pushstring(L, pack.id);
+    lua::setfield(L, "PACK_ID");
+    lua::pop(L);
     return std::shared_ptr<int>(new int(id), [=](int* id) {
-        state->removeEnvironment(*id);
+        state->removeEnvironment(L, *id);
         delete id;
     });
 }
 
 scriptenv scripting::create_doc_environment(const scriptenv& parent, const std::string& name) {
-    int id = state->createEnvironment(*parent);
-    state->pushenv(id);
-    state->pushvalue(-1);
-    state->setfield("DOC_ENV");
-    state->pushstring(name.c_str());
-    state->setfield("DOC_NAME");
+    auto L = state->getMainThread();
+    int id = state->createEnvironment(L, *parent);
+    state->pushenv(L, id);
+    lua_pushvalue(L, -1);
+    lua::setfield(L, "DOC_ENV");
+    lua::pushstring(L, name);
+    lua::setfield(L, "DOC_NAME");
     
-    if (state->getglobal("Document")) {
-        if (state->getfield("new")) {
-            state->pushstring(name.c_str());
-            if (state->callNoThrow(1)) {
-                state->setfield("document", -3);
+    if (lua::getglobal(L, "Document")) {
+        if (lua::getfield(L, "new")) {
+            lua::pushstring(L, name);
+            if (lua::callNoThrow(L, 1)) {
+                lua::setfield(L, "document", -3);
             }
         }
-        state->pop();
+        lua::pop(L);
     }
-    state->pop();
+    lua::pop(L);
     return std::shared_ptr<int>(new int(id), [=](int* id) {
-        state->removeEnvironment(*id);
+        state->removeEnvironment(L, *id);
         delete id;
     });
 }
 
 void scripting::process_post_runnables() {
-    if (state->getglobal("__process_post_runnables")) {
-        state->callNoThrow(0);
+    auto L = state->getMainThread();
+    if (lua::getglobal(L, "__process_post_runnables")) {
+        lua::callNoThrow(L, 0);
     }
 }
 
@@ -110,38 +114,42 @@ void scripting::on_world_load(LevelController* controller) {
     scripting::controller = controller;
     load_script("world.lua");
 
+    auto L = state->getMainThread();
     for (auto& pack : scripting::engine->getContentPacks()) {
-        state->emit_event(pack.id + ".worldopen");
+        state->emitEvent(L, pack.id + ".worldopen");
     }
 }
 
 void scripting::on_world_tick() {
+    auto L = state->getMainThread();
     for (auto& pack : scripting::engine->getContentPacks()) {
-        state->emit_event(pack.id + ".worldtick");
+        state->emitEvent(L, pack.id + ".worldtick");
     }
 }
 
 void scripting::on_world_save() {
+    auto L = state->getMainThread();
     for (auto& pack : scripting::engine->getContentPacks()) {
-        state->emit_event(pack.id + ".worldsave");
+        state->emitEvent(L, pack.id + ".worldsave");
     }
 }
 
 void scripting::on_world_quit() {
+    auto L = state->getMainThread();
     for (auto& pack : scripting::engine->getContentPacks()) {
-        state->emit_event(pack.id + ".worldquit");
+        state->emitEvent(L, pack.id + ".worldquit");
     }
 
-    state->getglobal("pack");
+    lua::getglobal(L, "pack");
     for (auto& pack : scripting::engine->getContentPacks()) {
-        state->getfield("unload");
-        state->pushstring(pack.id);
-        state->callNoThrow(1);   
+        lua::getfield(L, "unload");
+        lua::pushstring(L, pack.id);
+        lua::callNoThrow(L, 1);   
     }
-    state->pop();
+    lua::pop(L);
     
-    if (state->getglobal("__scripts_cleanup")) {
-        state->callNoThrow(0);
+    if (lua::getglobal(L, "__scripts_cleanup")) {
+        lua::callNoThrow(L, 0);
     }
     scripting::level = nullptr;
     scripting::content = nullptr;
@@ -152,77 +160,73 @@ void scripting::on_world_quit() {
 
 void scripting::on_blocks_tick(const Block* block, int tps) {
     std::string name = block->name + ".blockstick";
-    state->emit_event(name, [tps] (lua::LuaState* state) {
-        state->pushinteger(tps);
-        return 1;
+    state->emitEvent(state->getMainThread(), name, [tps] (lua_State* L) {
+        return lua::pushinteger(L, tps);
     });
 }
 
 void scripting::update_block(const Block* block, int x, int y, int z) {
     std::string name = block->name + ".update";
-    state->emit_event(name, [x, y, z] (lua::LuaState* state) {
-        state->pushivec3(x, y, z);
-        return 3; 
+    state->emitEvent(state->getMainThread(), name, [x, y, z] (lua_State* L) {
+        return lua::pushivec3(L, x, y, z);
     });
 }
 
 void scripting::random_update_block(const Block* block, int x, int y, int z) {
     std::string name = block->name + ".randupdate";
-    state->emit_event(name, [x, y, z] (lua::LuaState* state) {
-        state->pushivec3(x, y, z);
-        return 3;
+    state->emitEvent(state->getMainThread(), name, [x, y, z] (lua_State* L) {
+        return lua::pushivec3(L, x, y, z);
     });
 }
 
 void scripting::on_block_placed(Player* player, const Block* block, int x, int y, int z) {
     std::string name = block->name + ".placed";
-    state->emit_event(name, [x, y, z, player] (lua::LuaState* state) {
-        state->pushivec3(x, y, z);
-        state->pushinteger(player->getId());
-        return 4; 
+    state->emitEvent(state->getMainThread(), name, [x, y, z, player] (lua_State* L) {
+        lua::pushivec3(L, x, y, z);
+        lua::pushinteger(L, player->getId());
+        return 4;
     });
 }
 
 void scripting::on_block_broken(Player* player, const Block* block, int x, int y, int z) {
     std::string name = block->name + ".broken";
-    state->emit_event(name, [x, y, z, player] (lua::LuaState* state) {
-        state->pushivec3(x, y, z);
-        state->pushinteger(player->getId());
+    state->emitEvent(state->getMainThread(), name, [x, y, z, player] (lua_State* L) {
+        lua::pushivec3(L, x, y, z);
+        lua::pushinteger(L, player->getId());
         return 4;
     });
 }
 
 bool scripting::on_block_interact(Player* player, const Block* block, glm::ivec3 pos) {
     std::string name = block->name + ".interact";
-    return state->emit_event(name, [pos, player] (lua::LuaState* state) {
-        state->pushivec3(pos.x, pos.y, pos.z);
-        state->pushinteger(player->getId());
+    return state->emitEvent(state->getMainThread(), name, [pos, player] (lua_State* L) {
+        lua::pushivec3(L, pos.x, pos.y, pos.z);
+        lua::pushinteger(L, player->getId());
         return 4;
     });
 }
 
 bool scripting::on_item_use(Player* player, const ItemDef* item) {
     std::string name = item->name + ".use";
-    return state->emit_event(name, [player] (lua::LuaState* state) {
-        state->pushinteger(player->getId());
-        return 1;
+    return state->emitEvent(state->getMainThread(), name, [player] (lua_State* L) {
+        return lua::pushinteger(L, player->getId());
     });
 }
 
 bool scripting::on_item_use_on_block(Player* player, const ItemDef* item, int x, int y, int z) {
     std::string name = item->name + ".useon";
-    return state->emit_event(name, [x, y, z, player] (lua::LuaState* state) {
-        state->pushivec3(x, y, z);
-        state->pushinteger(player->getId());
+    return state->emitEvent(state->getMainThread(), name, [x, y, z, player] (lua_State* L) {
+        lua::pushivec3(L, x, y, z);
+        lua::pushinteger(L, player->getId());
         return 4;
     });
 }
 
 bool scripting::on_item_break_block(Player* player, const ItemDef* item, int x, int y, int z) {
     std::string name = item->name + ".blockbreakby";
-    return state->emit_event(name, [x, y, z, player] (lua::LuaState* state) {
-        state->pushivec3(x, y, z);
-        state->pushinteger(player->getId());
+    return state->emitEvent(state->getMainThread(), name, [x, y, z, player] (lua_State* L) {
+        lua::pushivec3(L, x, y, z);
+        lua::pushinteger(L, player->getId());
         return 4;
     });
 }
@@ -233,9 +237,9 @@ void scripting::on_ui_open(
 ) {
     auto argsptr = std::make_shared<std::vector<dynamic::Value>>(std::move(args));
     std::string name = layout->getId() + ".open";
-    state->emit_event(name, [=] (lua::LuaState* state) {
+    state->emitEvent(state->getMainThread(), name, [=] (lua_State* L) {
         for (const auto& value : *argsptr) {
-            state->pushvalue(value);
+            lua::pushvalue(L, value);
         }
         return argsptr->size();
     });
@@ -243,37 +247,37 @@ void scripting::on_ui_open(
 
 void scripting::on_ui_progress(UiDocument* layout, int workDone, int workTotal) {
     std::string name = layout->getId() + ".progress";
-    state->emit_event(name, [=] (lua::LuaState* state) {
-        state->pushinteger(workDone);
-        state->pushinteger(workTotal);
+    state->emitEvent(state->getMainThread(), name, [=] (lua_State* L) {
+        lua::pushinteger(L, workDone);
+        lua::pushinteger(L, workTotal);
         return 2;
     });
 }
 
 void scripting::on_ui_close(UiDocument* layout, Inventory* inventory) {
     std::string name = layout->getId() + ".close";
-    state->emit_event(name, [inventory] (lua::LuaState* state) {
-        state->pushinteger(inventory == nullptr ? 0 : inventory->getId());
-        return 1;
+    state->emitEvent(state->getMainThread(), name, [inventory] (lua_State* L) {
+        return lua::pushinteger(L, inventory ? inventory->getId() : 0);
     });
 }
 
 bool scripting::register_event(int env, const std::string& name, const std::string& id) {
-    if (state->pushenv(env) == 0) {
-        state->pushglobals();
+    auto L = state->getMainThread();
+    if (state->pushenv(L, env) == 0) {
+        lua::pushglobals(L);
     }
-    if (state->getfield(name)) {
-        state->pop();
-        state->getglobal("events");
-        state->getfield("on");
-        state->pushstring(id);
-        state->getfield(name, -4);
-        state->callNoThrow(2);
-        state->pop();
+    if (lua::getfield(L, name)) {
+        lua::pop(L);
+        lua::getglobal(L, "events");
+        lua::getfield(L, "on");
+        lua::pushstring(L, id);
+        lua::getfield(L, name, -4);
+        lua::callNoThrow(L, 2);
+        lua::pop(L);
 
         // remove previous name
-        state->pushnil();
-        state->setfield(name);
+        lua::pushnil(L);
+        lua::setfield(L, name);
         return true;
     }
     return false;
@@ -283,7 +287,7 @@ void scripting::load_block_script(const scriptenv& senv, const std::string& pref
     int env = *senv;
     std::string src = files::read_string(file);
     logger.info() << "script (block) " << file.u8string();
-    state->execute(env, src, file.u8string());
+    state->execute(state->getMainThread(), env, src, file.u8string());
     funcsset.init = register_event(env, "init", prefix+".init");
     funcsset.update = register_event(env, "on_update", prefix+".update");
     funcsset.randupdate = register_event(env, "on_random_update", prefix+".randupdate");
@@ -297,7 +301,7 @@ void scripting::load_item_script(const scriptenv& senv, const std::string& prefi
     int env = *senv;
     std::string src = files::read_string(file);
     logger.info() << "script (item) " << file.u8string();
-    state->execute(env, src, file.u8string());
+    state->execute(state->getMainThread(), env, src, file.u8string());
 
     funcsset.init = register_event(env, "init", prefix+".init");
     funcsset.on_use = register_event(env, "on_use", prefix+".use");
@@ -311,8 +315,7 @@ void scripting::load_world_script(const scriptenv& senv, const std::string& pref
     std::string src = files::read_string(file);
     logger.info() << "loading world script for " << prefix;
 
-    state->loadbuffer(env, src, file.u8string());
-    state->callNoThrow(0);
+    state->execute(state->getMainThread(), env, src, file.u8string());
 
     register_event(env, "init", prefix+".init");
     register_event(env, "on_world_open", prefix+".worldopen");
@@ -327,8 +330,7 @@ void scripting::load_layout_script(const scriptenv& senv, const std::string& pre
     std::string src = files::read_string(file);
     logger.info() << "loading script " << file.u8string();
 
-    state->loadbuffer(env, src, file.u8string());
-    state->callNoThrow(0);
+    state->execute(state->getMainThread(), env, src, file.u8string());
     script.onopen = register_event(env, "on_open", prefix+".open");
     script.onprogress = register_event(env, "on_progress", prefix+".progress");
     script.onclose = register_event(env, "on_close", prefix+".close");
diff --git a/src/logic/scripting/scripting_functional.cpp b/src/logic/scripting/scripting_functional.cpp
index 644b2b95..c381dc35 100644
--- a/src/logic/scripting/scripting_functional.cpp
+++ b/src/logic/scripting/scripting_functional.cpp
@@ -1,5 +1,6 @@
 #include "scripting_functional.hpp"
 
+#include "lua/lua_util.hpp"
 #include "lua/LuaState.hpp"
 #include "../../debug/Logger.hpp"
 #include "../../util/stringutil.hpp"
@@ -17,26 +18,30 @@ runnable scripting::create_runnable(
     const std::string& src,
     const std::string& file
 ) {
+    auto L = state->getMainThread();
     try {
-        state->loadbuffer(*env, src, file);
-        return state->createRunnable();
+        state->loadbuffer(L, *env, src, file);
+        return state->createRunnable(L);
     } catch (const lua::luaerror& err) {
         logger.error() << err.what();
         return [](){};
     }
 }
 
-static bool processCallback(
+static lua_State* processCallback(
     const scriptenv& env,
     const std::string& src,
     const std::string& file
 ) {
+    auto L = state->getMainThread();
     try {
-        return state->eval(*env, src, file) != 0;
+        if (state->eval(L, *env, src, file) != 0) {
+            return L;
+        }
     } catch (lua::luaerror& err) {
         logger.error() << err.what();
-        return false;
     }
+    return nullptr;
 }
 
 wstringconsumer scripting::create_wstring_consumer(
@@ -45,9 +50,9 @@ wstringconsumer scripting::create_wstring_consumer(
     const std::string& file
 ) {
     return [=](const std::wstring& x){
-        if (processCallback(env, src, file)) {
-            state->pushstring(util::wstr2str_utf8(x));
-            state->callNoThrow(1);
+        if (auto L = processCallback(env, src, file)) {
+            lua::pushwstring(L, x);
+            lua::callNoThrow(L, 1);
         }
     };
 }
@@ -58,12 +63,12 @@ wstringsupplier scripting::create_wstring_supplier(
     const std::string& file
 ) {
     return [=](){
-        if (processCallback(env, src, file)) {
-            if (state->isfunction(-1)) {
-                state->callNoThrow(0);
+        if (auto L = processCallback(env, src, file)) {
+            if (lua_isfunction(L, -1)) {
+                lua::callNoThrow(L, 0);
             }
-            auto str = state->tostring(-1); state->pop();
-            return util::str2wstr_utf8(str);
+            auto str = lua::require_wstring(L, -1); lua_pop(L, 1);
+            return str;
         }
         return std::wstring(L"");
     };
@@ -75,10 +80,10 @@ wstringchecker scripting::create_wstring_validator(
     const std::string& file
 ) {
     return [=](const std::wstring& x){
-        if (processCallback(env, src, file)) {
-            state->pushstring(util::wstr2str_utf8(x));
-            if (state->callNoThrow(1))
-                return state->toboolean(-1);
+        if (auto L = processCallback(env, src, file)) {
+            lua::pushwstring(L, x);
+            if (lua::callNoThrow(L, 1))
+                return lua::toboolean(L, -1);
         }
         return false;
     };
@@ -90,9 +95,9 @@ boolconsumer scripting::create_bool_consumer(
     const std::string& file
 ) {
     return [=](bool x){
-        if (processCallback(env, src, file)) {
-            state->pushboolean(x);
-            state->callNoThrow(1);
+        if (auto L = processCallback(env, src, file)) {
+            lua::pushboolean(L, x);
+            lua::callNoThrow(L, 1);
         }
     };
 }
@@ -103,11 +108,11 @@ boolsupplier scripting::create_bool_supplier(
     const std::string& file
 ) {
     return [=](){
-        if (processCallback(env, src, file)) {
-            if (state->isfunction(-1)) {
-                state->callNoThrow(0);
+        if (auto L = processCallback(env, src, file)) {
+            if (lua_isfunction(L, -1)) {
+                lua::callNoThrow(L, 0);
             }
-            bool x = state->toboolean(-1); state->pop();
+            bool x = lua::toboolean(L,-1); lua_pop(L, 1);
             return x;
         }
         return false;
@@ -120,9 +125,9 @@ doubleconsumer scripting::create_number_consumer(
     const std::string& file
 ) {
     return [=](double x){
-        if (processCallback(env, src, file)) {
-            state->pushnumber(x);
-            state->callNoThrow(1);
+        if (auto L = processCallback(env, src, file)) {
+            lua::pushnumber(L, x);
+            lua::callNoThrow(L, 1);
         }
     };
 }
@@ -133,12 +138,12 @@ doublesupplier scripting::create_number_supplier(
     const std::string& file
 ) {
     return [=](){
-        if (processCallback(env, src, file)) {
-            if (state->isfunction(-1)) {
-                state->callNoThrow(0);
+        if (auto L = processCallback(env, src, file)) {
+            if (lua_isfunction(L, -1)) {
+                lua::callNoThrow(L, 0);
             }
-            auto x = state->tonumber(-1); 
-            state->pop();
+            auto x = lua_tonumber(L, -1); 
+            lua::pop(L);
             return x;
         }
         return 0.0;
@@ -150,12 +155,12 @@ int_array_consumer scripting::create_int_array_consumer(
     const std::string& src, 
     const std::string& file
 ) {
-    return [=](const int arr[], size_t len){
-        if (processCallback(env, src, file)) {
+    return [=](const int arr[], size_t len) {
+        if (auto L = processCallback(env, src, file)) {
             for (uint i = 0; i < len; i++) {
-                state->pushinteger(arr[i]);
+                lua::pushinteger(L, arr[i]);
             }
-            state->callNoThrow(len);
+            lua::callNoThrow(L, len);
         }
     };
 }
@@ -165,13 +170,13 @@ vec2supplier scripting::create_vec2_supplier(
     const std::string& src, 
     const std::string& file
 ) {
-    return [=](){
-        if (processCallback(env, src, file)) {
-            if (state->isfunction(-1)) {
-                state->callNoThrow(0);
+    return [=]() {
+        if (auto L = processCallback(env, src, file)) {
+            if (lua_isfunction(L, -1)) {
+                lua::callNoThrow(L, 0);
             }
-            auto y = state->tonumber(-1); state->pop();
-            auto x = state->tonumber(-1); state->pop();
+            auto y = lua_tonumber(L, -1); lua::pop(L);
+            auto x = lua_tonumber(L, -1); lua::pop(L);
             return glm::vec2(x, y);
         }
         return glm::vec2(0, 0);
diff --git a/src/logic/scripting/scripting_hud.cpp b/src/logic/scripting/scripting_hud.cpp
index 2c78973b..c1853dad 100644
--- a/src/logic/scripting/scripting_hud.cpp
+++ b/src/logic/scripting/scripting_hud.cpp
@@ -1,6 +1,7 @@
 #include "scripting_hud.hpp"
 #include "scripting.hpp"
 
+#include "lua/lua_util.hpp"
 #include "lua/api_lua.hpp"
 #include "lua/LuaState.hpp"
 
@@ -13,6 +14,7 @@
 namespace scripting {
     extern lua::LuaState* state;
 }
+using namespace scripting;
 
 static debug::Logger logger("scripting-hud");
 
@@ -20,21 +22,21 @@ Hud* scripting::hud = nullptr;
 
 void scripting::on_frontend_init(Hud* hud) {
     scripting::hud = hud;
-    scripting::state->openlib("hud", hudlib);
+    state->openlib(state->getMainThread(), "hud", hudlib);
 
     for (auto& pack : scripting::engine->getContentPacks()) {
-        state->emit_event(pack.id + ".hudopen", [&] (lua::LuaState* state) {
-            state->pushinteger(hud->getPlayer()->getId());
-            return 1;            
+        state->emitEvent(state->getMainThread(), pack.id + ".hudopen", 
+        [&] (lua_State* L) {
+            return lua::pushinteger(L, hud->getPlayer()->getId());        
         });
     }
 }
 
 void scripting::on_frontend_close() {
     for (auto& pack : scripting::engine->getContentPacks()) {
-        state->emit_event(pack.id + ".hudclose", [&] (lua::LuaState* state) {
-            state->pushinteger(hud->getPlayer()->getId());
-            return 1;            
+        state->emitEvent(state->getMainThread(), pack.id + ".hudclose", 
+        [&] (lua_State* L) {
+            return lua::pushinteger(L, hud->getPlayer()->getId());            
         });
     }
     scripting::hud = nullptr;
@@ -45,8 +47,9 @@ void scripting::load_hud_script(const scriptenv& senv, const std::string& packid
     std::string src = files::read_string(file);
     logger.info() << "loading script " << file.u8string();
 
-    state->loadbuffer(env, src, file.u8string());
-    state->callNoThrow(0);
+    auto L = state->getMainThread();
+    state->loadbuffer(L, env, src, file.u8string());
+    lua::callNoThrow(L, 0);
 
     register_event(env, "init", packid+".init");
     register_event(env, "on_hud_open", packid+".hudopen");