diff --git a/res/layouts/inventory.xml b/res/layouts/inventory.xml
index dd1fe8c6..90279abd 100644
--- a/res/layouts/inventory.xml
+++ b/res/layouts/inventory.xml
@@ -1,4 +1,4 @@
-<inventory color="#00000080" size="400,0">
+<inventory color="#1F1F1FE0" size="400,0">
     <slots-grid cols="4" count="40"/>
     <button padding="10,10,10,10" coord="300,10">Test</button>
 </inventory>
diff --git a/res/layouts/inventory.xml.lua b/res/layouts/inventory.xml.lua
new file mode 100644
index 00000000..707a516c
--- /dev/null
+++ b/res/layouts/inventory.xml.lua
@@ -0,0 +1,7 @@
+function on_open()
+    print("OPEN")
+end
+
+function on_close()
+    print("CLOSE")
+end
diff --git a/res/modules/toml.lua b/res/modules/toml.lua
new file mode 100644
index 00000000..fb082e75
--- /dev/null
+++ b/res/modules/toml.lua
@@ -0,0 +1,65 @@
+-- TOML serialization module
+local toml = {}
+
+-- Convert table to TOML
+function toml.serialize(tb, isinner)
+    local text = ""
+    for k, v in pairs(tb) do
+        local tp = type(v)
+        if tp ~= "table" then
+            text = text..k.." = "
+            if tp == "string" then
+                text = text..string.format("%q", v)
+            else
+                text = text..tostring(v)
+            end
+            text = text.."\n"
+        end
+    end
+    for k, v in pairs(tb) do
+        local tp = type(v)
+        if tp == "table" then
+            if isinner then
+                error("only one level of subtables supported")
+            end
+            text = text.."["..k.."]\n"..toml.serialize(v).."\n"
+        end
+    end
+    return text
+end
+
+-- Parse TOML to new table
+function toml.deserialize(s)
+    local output = {}
+    local current = output
+    local lines = {}
+    for line in string.gmatch(s, "[^\r\n]+") do
+        line = string.gsub(line, "%s+", "")
+        table.insert(lines, line)
+    end
+    for i = 1,#lines do
+        local s = lines[i]
+        if string.sub(s, 1, 1) == "[" then
+            local section = s.sub(s, 2, #s-1)
+            current = {}
+            output[section] = current
+        else 
+            for k, v in string.gmatch(s, "(%w+)=(.+)" ) do
+                v = string.gsub(v, "%s+", "")
+                if v.sub(v, 1, 1) == "\"" then
+                    current[k] = v.sub(v, 2, #v-1)
+                elseif v == "true" or v == "false" then
+                    current[k] = v == "true"
+                end
+                
+                local num = tonumber(v)
+                if num ~= nil then
+                    current[k] = num
+                end
+            end
+        end
+    end
+    return output
+end
+
+return toml
diff --git a/res/scripts/stdlib.lua b/res/scripts/stdlib.lua
index 40bc500a..09d28f55 100644
--- a/res/scripts/stdlib.lua
+++ b/res/scripts/stdlib.lua
@@ -53,6 +53,16 @@ function load_script(path, nocache)
     return result
 end
 
+function require(path)
+    local prefix, file = parse_path(path)
+    return load_script(prefix..":modules/"..file..".lua")
+end
+
+function __reset_scripts_cache()
+    __cached_scripts = {}
+    __cached_results = {}
+end
+
 function sleep(timesec)
     local start = time.uptime()
     while time.uptime() - start < timesec do
@@ -78,69 +88,6 @@ function dofile(path)
     return _dofile(path)
 end
 
-toml = {}
-
--- Convert table to TOML
-function toml.from_table(tb, isinner)
-    local text = ""
-    for k, v in pairs(tb) do
-        local tp = type(v)
-        if tp ~= "table" then
-            text = text..k.." = "
-            if tp == "string" then
-                text = text..string.format("%q", v)
-            else
-                text = text..tostring(v)
-            end
-            text = text.."\n"
-        end
-    end
-    for k, v in pairs(tb) do
-        local tp = type(v)
-        if tp == "table" then
-            if isinner then
-                error("only one level of subtables supported")
-            end
-            text = text.."["..k.."]\n"..toml.from_table(v).."\n"
-        end
-    end
-    return text
-end
-
--- Parse TOML to new table
-function toml.parse(s)
-    local output = {}
-    local current = output
-    local lines = {}
-    for line in string.gmatch(s, "[^\r\n]+") do
-        line = string.gsub(line, "%s+", "")
-        table.insert(lines, line)
-    end
-    for i = 1,#lines do
-        local s = lines[i]
-        if string.sub(s, 1, 1) == "[" then
-            local section = s.sub(s, 2, #s-1)
-            current = {}
-            output[section] = current
-        else 
-            for k, v in string.gmatch(s, "(%w+)=(.+)" ) do
-                v = string.gsub(v, "%s+", "")
-                if v.sub(v, 1, 1) == "\"" then
-                    current[k] = v.sub(v, 2, #v-1)
-                elseif v == "true" or v == "false" then
-                    current[k] = v == "true"
-                end
-                
-                local num = tonumber(v)
-                if num ~= nil then
-                    current[k] = num
-                end
-            end
-        end
-    end
-    return output
-end
-
 function pack.is_installed(packid)
     return file.isfile(packid..":package.json")
 end
diff --git a/src/assets/Assets.h b/src/assets/Assets.h
index fbe976de..87e94380 100644
--- a/src/assets/Assets.h
+++ b/src/assets/Assets.h
@@ -14,6 +14,12 @@ class Font;
 class Atlas;
 class UiDocument;
 
+struct LayoutCfg {
+    int env;
+
+    LayoutCfg(int env) : env(env) {}
+};
+
 class Assets {
 	std::unordered_map<std::string, std::shared_ptr<Texture>> textures;
 	std::unordered_map<std::string, std::shared_ptr<Shader>> shaders;
diff --git a/src/assets/AssetsLoader.cpp b/src/assets/AssetsLoader.cpp
index 35babebc..0877564e 100644
--- a/src/assets/AssetsLoader.cpp
+++ b/src/assets/AssetsLoader.cpp
@@ -8,6 +8,8 @@
 
 #include "../constants.h"
 #include "../files/engine_paths.h"
+#include "../content/Content.h"
+#include "../logic/scripting/scripting.h"
 
 AssetsLoader::AssetsLoader(Assets* assets, const ResPaths* paths) 
 	: assets(assets), paths(paths) {
@@ -17,8 +19,8 @@ void AssetsLoader::addLoader(int tag, aloader_func func) {
 	loaders[tag] = func;
 }
 
-void AssetsLoader::add(int tag, const std::string filename, const std::string alias) {
-	entries.push(aloader_entry{ tag, filename, alias });
+void AssetsLoader::add(int tag, const std::string filename, const std::string alias, std::shared_ptr<void> settings) {
+	entries.push(aloader_entry{ tag, filename, alias, settings});
 }
 
 bool AssetsLoader::hasNext() const {
@@ -35,7 +37,7 @@ bool AssetsLoader::loadNext() {
 		return false;
 	}
 	aloader_func loader = found->second;
-	bool status = loader(assets, paths, entry.filename, entry.alias);
+	bool status = loader(assets, paths, entry.filename, entry.alias, entry.config);
 	entries.pop();
 	return status;
 }
@@ -48,7 +50,20 @@ void AssetsLoader::createDefaults(AssetsLoader& loader) {
     loader.addLoader(ASSET_LAYOUT, assetload::layout);
 }
 
-void AssetsLoader::addDefaults(AssetsLoader& loader, bool world) {
+void addLayouts(int env, const std::string& prefix, const fs::path& folder, AssetsLoader& loader) {
+    if (!fs::is_directory(folder)) {
+        return;
+    }
+    for (auto& entry : fs::directory_iterator(folder)) {
+        const fs::path file = entry.path();
+        if (file.extension().u8string() != ".xml")
+            continue;
+        std::string name = prefix+":"+file.stem().u8string();
+        loader.add(ASSET_LAYOUT, file.u8string(), name, std::make_shared<LayoutCfg>(env));
+    }
+}
+
+void AssetsLoader::addDefaults(AssetsLoader& loader, const Content* content) {
     loader.add(ASSET_FONT, FONTS_FOLDER"/font", "normal");
     loader.add(ASSET_SHADER, SHADERS_FOLDER"/ui", "ui");
     loader.add(ASSET_SHADER, SHADERS_FOLDER"/main", "main");
@@ -58,13 +73,20 @@ void AssetsLoader::addDefaults(AssetsLoader& loader, bool world) {
     loader.add(ASSET_TEXTURE, TEXTURES_FOLDER"/gui/no_icon.png", "gui/no_icon");
     loader.add(ASSET_TEXTURE, TEXTURES_FOLDER"/gui/warning.png", "gui/warning");
     loader.add(ASSET_TEXTURE, TEXTURES_FOLDER"/gui/error.png", "gui/error");
-    if (world) {
+    if (content) {
         loader.add(ASSET_SHADER, SHADERS_FOLDER"/ui3d", "ui3d");
         loader.add(ASSET_SHADER, SHADERS_FOLDER"/background", "background");
         loader.add(ASSET_SHADER, SHADERS_FOLDER"/skybox_gen", "skybox_gen");
         loader.add(ASSET_TEXTURE, TEXTURES_FOLDER"/misc/moon.png", "misc/moon");
         loader.add(ASSET_TEXTURE, TEXTURES_FOLDER"/misc/sun.png", "misc/sun");
 
+        addLayouts(0, "core", loader.getPaths()->getMainRoot()/fs::path("layouts"), loader);
+        for (auto& pack : content->getPacks()) {
+            auto& info = pack->getInfo();
+            fs::path folder = info.folder / fs::path("layouts");
+            addLayouts(pack->getEnvironment()->getId(), info.id, folder, loader);
+        }
+
         for (fs::path& file : loader.getPaths()->listdir(LAYOUTS_FOLDER)) {
             if (file.extension().u8string() != ".xml")
                 continue;
@@ -72,7 +94,7 @@ void AssetsLoader::addDefaults(AssetsLoader& loader, bool world) {
             if (packName == "res") {
                 packName = "core";
             }
-            loader.add(ASSET_LAYOUT, file.u8string(), packName+":"+file.stem().u8string());
+            //loader.add(ASSET_LAYOUT, file.u8string(), packName+":"+file.stem().u8string());
         }
     }
     loader.add(ASSET_ATLAS, TEXTURES_FOLDER"/blocks", "blocks");
diff --git a/src/assets/AssetsLoader.h b/src/assets/AssetsLoader.h
index bce21bdf..4cab14be 100644
--- a/src/assets/AssetsLoader.h
+++ b/src/assets/AssetsLoader.h
@@ -2,6 +2,7 @@
 #define ASSETS_ASSETS_LOADER_H
 
 #include <string>
+#include <memory>
 #include <functional>
 #include <map>
 #include <queue>
@@ -14,13 +15,15 @@ const short ASSET_LAYOUT = 5;
 
 class ResPaths;
 class Assets;
+class Content;
 
-using aloader_func = std::function<bool(Assets*, const ResPaths*, const std::string&, const std::string&)>;
+using aloader_func = std::function<bool(Assets*, const ResPaths*, const std::string&, const std::string&, std::shared_ptr<void>)>;
 
 struct aloader_entry {
 	int tag;
 	const std::string filename;
 	const std::string alias;
+    std::shared_ptr<void> config;
 };
 
 class AssetsLoader {
@@ -31,13 +34,18 @@ class AssetsLoader {
 public:
 	AssetsLoader(Assets* assets, const ResPaths* paths);
 	void addLoader(int tag, aloader_func func);
-	void add(int tag, const std::string filename, const std::string alias);
+	void add(
+        int tag, 
+        const std::string filename, 
+        const std::string alias, 
+        std::shared_ptr<void> settings=nullptr
+    );
 
 	bool hasNext() const;
 	bool loadNext();
 
 	static void createDefaults(AssetsLoader& loader);
-	static void addDefaults(AssetsLoader& loader, bool world);
+	static void addDefaults(AssetsLoader& loader, const Content* content);
 
 	const ResPaths* getPaths() const;
 };
diff --git a/src/assets/assetload_funcs.cpp b/src/assets/assetload_funcs.cpp
index 9820d585..90dabcde 100644
--- a/src/assets/assetload_funcs.cpp
+++ b/src/assets/assetload_funcs.cpp
@@ -20,7 +20,9 @@ namespace fs = std::filesystem;
 bool assetload::texture(Assets* assets,
                         const ResPaths* paths,
                         const std::string filename, 
-                        const std::string name) {
+                        const std::string name,
+                        std::shared_ptr<void>
+) {
     std::unique_ptr<Texture> texture(
         png::load_texture(paths->find(filename).u8string())
     );
@@ -35,7 +37,9 @@ bool assetload::texture(Assets* assets,
 bool assetload::shader(Assets* assets,
                        const ResPaths* paths,
                        const std::string filename, 
-                       const std::string name) {
+                       const std::string name,
+                       std::shared_ptr<void>
+) {
     fs::path vertexFile = paths->find(filename+".glslv");
     fs::path fragmentFile = paths->find(filename+".glslf");
 
@@ -78,7 +82,9 @@ static bool appendAtlas(AtlasBuilder& atlas, const fs::path& file) {
 bool assetload::atlas(Assets* assets, 
                       const ResPaths* paths,
                       const std::string directory, 
-                      const std::string name) {
+                      const std::string name,
+                      std::shared_ptr<void>
+) {
     AtlasBuilder builder;
     for (const auto& file : paths->listdir(directory)) {
         if (!appendAtlas(builder, file)) continue;
@@ -94,7 +100,9 @@ bool assetload::atlas(Assets* assets,
 bool assetload::font(Assets* assets, 
                      const ResPaths* paths,
                      const std::string filename, 
-                     const std::string name) {
+                     const std::string name,
+                     std::shared_ptr<void>
+) {
     std::vector<std::unique_ptr<Texture>> pages;
     for (size_t i = 0; i <= 4; i++) {
         std::string name = filename + "_" + std::to_string(i) + ".png"; 
@@ -113,6 +121,26 @@ bool assetload::font(Assets* assets,
     return true;
 }
 
+bool assetload::layout(
+    Assets* assets,
+    const ResPaths* paths,
+    const std::string file,
+    const std::string name,
+    std::shared_ptr<void> config
+) {
+    try {
+        LayoutCfg* cfg = reinterpret_cast<LayoutCfg*>(config.get());
+        auto document = UiDocument::read(cfg->env, name, file);
+        assets->store(document.release(), name);
+        return true;
+    } catch (const parsing_error& err) {
+        std::cerr << "failed to parse layout XML '" << file << "'" << std::endl;
+        std::cerr << err.errorLog() << std::endl;
+        return false;
+    }
+}
+
+
 bool assetload::animation(Assets* assets, 
                         const ResPaths* paths, 
                         const std::string directory, 
@@ -206,20 +234,3 @@ bool assetload::animation(Assets* assets,
     }
     return true;
 }
-
-bool assetload::layout(
-    Assets* assets,
-    const ResPaths* paths,
-    const std::string file,
-    const std::string name
-) {
-    try {
-        auto document = UiDocument::read(name, file);
-        assets->store(document.release(), name);
-        return true;
-    } catch (const parsing_error& err) {
-        std::cerr << "failed to parse layout XML '" << file << "'" << std::endl;
-        std::cerr << err.errorLog() << std::endl;
-        return false;
-    }
-}
diff --git a/src/assets/assetload_funcs.h b/src/assets/assetload_funcs.h
index 830d1d5a..745cadc5 100644
--- a/src/assets/assetload_funcs.h
+++ b/src/assets/assetload_funcs.h
@@ -2,6 +2,7 @@
 #define ASSETS_ASSET_LOADERS_H_
 
 #include <string>
+#include <memory>
 
 class ResPaths;
 class Assets;
@@ -12,26 +13,38 @@ namespace assetload {
         Assets* assets, 
         const ResPaths* paths,
         const std::string filename, 
-        const std::string name
+        const std::string name,
+        std::shared_ptr<void> settings
     );
     bool shader(
         Assets* assets,
         const ResPaths* paths,
         const std::string filename, 
-        const std::string name
+        const std::string name,
+        std::shared_ptr<void> settings
     );
     bool atlas(
         Assets* assets,
         const ResPaths* paths, 
         const std::string directory, 
-        const std::string name
+        const std::string name,
+        std::shared_ptr<void> settings
     );
     bool font(
         Assets* assets, 
         const ResPaths* paths,
         const std::string filename, 
-        const std::string name
+        const std::string name,
+        std::shared_ptr<void> settings
     );
+    bool layout(
+        Assets* assets,
+        const ResPaths* paths,
+        const std::string file,
+        const std::string name,
+        std::shared_ptr<void> settings
+    );
+
     bool animation(
         Assets* assets,
         const ResPaths* paths,
@@ -39,12 +52,6 @@ namespace assetload {
         const std::string name,
         Atlas* dstAtlas
     );
-    bool layout(
-        Assets* assets,
-        const ResPaths* paths,
-        const std::string file,
-        const std::string name
-    );
 }
 
 #endif // ASSETS_ASSET_LOADERS_H_
\ No newline at end of file
diff --git a/src/engine.cpp b/src/engine.cpp
index 3b1797e5..071dba63 100644
--- a/src/engine.cpp
+++ b/src/engine.cpp
@@ -56,7 +56,7 @@ Engine::Engine(EngineSettings& settings, EnginePaths* paths)
     assets.reset(new Assets());
 	AssetsLoader loader(assets.get(), resPaths.get());
 	AssetsLoader::createDefaults(loader);
-	AssetsLoader::addDefaults(loader, false);
+	AssetsLoader::addDefaults(loader, nullptr);
 
     Shader::preprocessor->setPaths(resPaths.get());
 	while (loader.hasNext()) {
@@ -164,7 +164,8 @@ void Engine::loadContent() {
 		for (auto& pack : srcPacks) {
 			if(loadedPacks.find(pack.id) != loadedPacks.end()) continue;
 			missingDependency = checkPacks(existingPacks, pack.dependencies);
-			if(!missingDependency.empty()) throw contentpack_error(pack.id, pack.folder, "missing dependency '"+missingDependency+"'");
+			if(!missingDependency.empty()) 
+                throw contentpack_error(pack.id, pack.folder, "missing dependency '"+missingDependency+"'");
 			if(pack.dependencies.empty() || checkPacks(loadedPacks, pack.dependencies).empty()) {
 				loadedPacks.insert(pack.id);
 				resRoots.push_back(pack.folder);
@@ -184,7 +185,7 @@ void Engine::loadContent() {
 	std::cout << "-- loading assets" << std::endl;
 	AssetsLoader loader(new_assets.get(), resPaths.get());
     AssetsLoader::createDefaults(loader);
-    AssetsLoader::addDefaults(loader, true);
+    AssetsLoader::addDefaults(loader, content.get());
 	while (loader.hasNext()) {
 		if (!loader.loadNext()) {
 			new_assets.reset();
diff --git a/src/files/engine_paths.cpp b/src/files/engine_paths.cpp
index 10157ded..585268dc 100644
--- a/src/files/engine_paths.cpp
+++ b/src/files/engine_paths.cpp
@@ -159,3 +159,7 @@ std::vector<fs::path> ResPaths::listdir(const std::string& folderName) const {
     }
     return entries;
 }
+
+const fs::path& ResPaths::getMainRoot() const {
+    return mainRoot;
+}
diff --git a/src/files/engine_paths.h b/src/files/engine_paths.h
index 760a1ba5..d0411e26 100644
--- a/src/files/engine_paths.h
+++ b/src/files/engine_paths.h
@@ -42,6 +42,8 @@ public:
     
     fs::path find(const std::string& filename) const;
     std::vector<fs::path> listdir(const std::string& folder) const;
+
+    const fs::path& getMainRoot() const;
 };
 
 #endif // FILES_ENGINE_PATHS_H_
\ No newline at end of file
diff --git a/src/frontend/InventoryView.cpp b/src/frontend/InventoryView.cpp
index 1380245b..76eba07b 100644
--- a/src/frontend/InventoryView.cpp
+++ b/src/frontend/InventoryView.cpp
@@ -296,6 +296,10 @@ std::shared_ptr<SlotView> InventoryView::addSlot(SlotLayout layout) {
     return slot;
 }
 
+std::shared_ptr<Inventory> InventoryView::getInventory() const {
+    return inventory;
+}
+
 void InventoryView::bind(
     std::shared_ptr<Inventory> inventory,
     LevelFrontend* frontend, 
diff --git a/src/frontend/InventoryView.h b/src/frontend/InventoryView.h
index 22ba1823..0d593d8b 100644
--- a/src/frontend/InventoryView.h
+++ b/src/frontend/InventoryView.h
@@ -115,6 +115,8 @@ public:
 
     std::shared_ptr<SlotView> addSlot(SlotLayout layout);
 
+    std::shared_ptr<Inventory> getInventory() const;
+
     static std::shared_ptr<InventoryView> readXML(
         const std::string& src,
         const std::string& file,
diff --git a/src/frontend/UiDocument.cpp b/src/frontend/UiDocument.cpp
index cfb769a8..0274d8fa 100644
--- a/src/frontend/UiDocument.cpp
+++ b/src/frontend/UiDocument.cpp
@@ -8,11 +8,11 @@
 #include "../frontend/gui/gui_xml.h"
 
 UiDocument::UiDocument(
-    std::string namesp, 
+    std::string id, 
     uidocscript script, 
     std::shared_ptr<gui::UINode> root,
     int env
-) : namesp(namesp), script(script), root(root), env(env) {
+) : id(id), script(script), root(root), env(env) {
     collect(map, root);
 }
 
@@ -21,14 +21,22 @@ const uinodes_map& UiDocument::getMap() const {
     return map;
 }
 
-const std::string& UiDocument::getNamespace() const {
-    return namesp;
+const std::string& UiDocument::getId() const {
+    return id;
 }
 
 const std::shared_ptr<gui::UINode> UiDocument::getRoot() const {
     return root;
 }
 
+const uidocscript& UiDocument::getScript() const {
+    return script;
+}
+
+int UiDocument::getEnvironment() const {
+    return env;
+}
+
 void UiDocument::collect(uinodes_map& map, std::shared_ptr<gui::UINode> node) {
     const std::string& id = node->getId();
     if (!id.empty()) {
@@ -42,11 +50,10 @@ void UiDocument::collect(uinodes_map& map, std::shared_ptr<gui::UINode> node) {
     }
 }
 
-std::unique_ptr<UiDocument> UiDocument::read(std::string namesp, fs::path file) {
+std::unique_ptr<UiDocument> UiDocument::read(int env, std::string namesp, fs::path file) {
     const std::string text = files::read_string(file);
     auto xmldoc = xml::parse(file.u8string(), text);
-    auto env = scripting::create_environment();
-    gui::UiXmlReader reader(*env);
+    gui::UiXmlReader reader(env);
     InventoryView::createReaders(reader);
     auto view = reader.readXML(
         file.u8string(), xmldoc->getRoot()
@@ -54,7 +61,7 @@ std::unique_ptr<UiDocument> UiDocument::read(std::string namesp, fs::path file)
     uidocscript script {};
     auto scriptFile = fs::path(file.u8string()+".lua");
     if (fs::is_regular_file(scriptFile)) {
-        scripting::load_layout_script(env->getId(), namesp, scriptFile, script);
+        scripting::load_layout_script(env, namesp, scriptFile, script);
     }
-    return std::make_unique<UiDocument>(namesp, script, view, env.release()->getId());
+    return std::make_unique<UiDocument>(namesp, script, view, env);
 }
diff --git a/src/frontend/UiDocument.h b/src/frontend/UiDocument.h
index 45484b01..f5818190 100644
--- a/src/frontend/UiDocument.h
+++ b/src/frontend/UiDocument.h
@@ -21,26 +21,28 @@ struct uidocscript {
 using uinodes_map = std::unordered_map<std::string, std::shared_ptr<gui::UINode>>;
 
 class UiDocument {
-    std::string namesp;
+    std::string id;
     uidocscript script;
     uinodes_map map;
     std::shared_ptr<gui::UINode> root;
     int env;
 public:
     UiDocument(
-        std::string namesp, 
+        std::string id, 
         uidocscript script, 
         std::shared_ptr<gui::UINode> root, 
-        int env);
+        int env
+    );
 
+    const std::string& getId() const;
     const uinodes_map& getMap() const;
-    const std::string& getNamespace() const;
     const std::shared_ptr<gui::UINode> getRoot() const;
-
+    const uidocscript& getScript() const;
+    int getEnvironment() const;
     /* Collect map of all uinodes having identifiers */
     static void collect(uinodes_map& map, std::shared_ptr<gui::UINode> node);
 
-    static std::unique_ptr<UiDocument> read (std::string namesp, fs::path file);
+    static std::unique_ptr<UiDocument> read(int env, std::string namesp, fs::path file);
 };
 
 #endif // FRONTEND_UI_DOCUMENT_H_
diff --git a/src/frontend/gui/gui_xml.cpp b/src/frontend/gui/gui_xml.cpp
index f7ad4a96..6400e82c 100644
--- a/src/frontend/gui/gui_xml.cpp
+++ b/src/frontend/gui/gui_xml.cpp
@@ -125,8 +125,8 @@ static std::shared_ptr<UINode> readButton(UiXmlReader& reader, xml::xmlelement e
     if (element->has("onclick")) {
         auto callback = scripting::create_runnable(
             reader.getEnvironment().getId(),
-            "<onclick>", 
-            element->attr("onclick").getText()
+            element->attr("onclick").getText(),
+            "<onclick>"
         );
         button->listenAction([callback](GUI*) {
             callback();
diff --git a/src/frontend/hud.cpp b/src/frontend/hud.cpp
index ef847332..a0d4e235 100644
--- a/src/frontend/hud.cpp
+++ b/src/frontend/hud.cpp
@@ -46,6 +46,7 @@
 #include "../core_defs.h"
 #include "../items/ItemDef.h"
 #include "../items/Inventory.h"
+#include "../logic/scripting/scripting.h"
 
 using glm::vec2;
 using glm::vec3;
@@ -212,31 +213,6 @@ std::shared_ptr<InventoryView> HudRenderer::createHotbar() {
     return view;
 }
 
-std::shared_ptr<InventoryView> HudRenderer::createInventory() {
-    auto level = frontend->getLevel();
-    auto player = level->player;
-    auto inventory = player->getInventory();
-
-    auto layout = assets->getLayout("core:inventory");
-    if (layout) {
-        std::cout << "custom layout used" << std::endl;
-        auto view = std::dynamic_pointer_cast<InventoryView>(layout->getRoot());
-        view->bind(inventory, frontend, interaction.get());
-        return view;
-    } else {
-        std::cout << "generated layout used" << std::endl;
-        SlotLayout slotLayout(-1, glm::vec2(), true, false, [=](ItemStack& stack) {
-            stack.clear();
-        }, nullptr);
-
-        InventoryBuilder builder;
-        builder.addGrid(10, inventory->size(), glm::vec2(), 4, true, slotLayout);
-        auto view = builder.build();
-        view->bind(inventory, frontend, interaction.get());
-        return view;
-    }
-}
-
 HudRenderer::HudRenderer(Engine* engine, LevelFrontend* frontend) 
     : assets(engine->getAssets()), 
       gui(engine->getGUI()),
@@ -265,8 +241,6 @@ HudRenderer::HudRenderer(Engine* engine, LevelFrontend* frontend)
     contentAccessPanel->setScrollable(true);
 
     hotbarView = createHotbar();
-    inventoryView = createInventory();
-
     darkOverlay = std::make_unique<Panel>(glm::vec2(4000.0f));
     darkOverlay->setColor(glm::vec4(0, 0, 0, 0.5f));
 
@@ -281,13 +255,14 @@ HudRenderer::HudRenderer(Engine* engine, LevelFrontend* frontend)
     gui->addBack(hotbarView);
     gui->add(debugPanel);
     gui->add(contentAccessPanel);
-    gui->add(inventoryView);
     gui->add(grabbedItemView);
 }
 
 HudRenderer::~HudRenderer() {
     gui->remove(grabbedItemView);
-    gui->remove(inventoryView);
+    if (inventoryView) {
+        gui->remove(inventoryView);
+    }
     gui->remove(hotbarView);
     gui->remove(darkOverlay);
     gui->remove(contentAccessPanel);
@@ -330,7 +305,7 @@ void HudRenderer::update(bool visible) {
             if (inventoryOpen) {
                 closeInventory();
             } else {
-                inventoryOpen = true;
+                openInventory();
             }
         }
     }
@@ -339,7 +314,6 @@ void HudRenderer::update(bool visible) {
     }
 
     vec2 invSize = contentAccessPanel->getSize();
-    inventoryView->setVisible(inventoryOpen);
     contentAccessPanel->setVisible(inventoryOpen);
     contentAccessPanel->setSize(vec2(invSize.x, Window::height));
     hotbarView->setVisible(visible);
@@ -364,10 +338,31 @@ void HudRenderer::update(bool visible) {
     darkOverlay->setVisible(pause);
 }
 
+void HudRenderer::openInventory() {
+    auto level = frontend->getLevel();
+    auto player = level->player;
+    auto inventory = player->getInventory();
+
+    inventoryOpen = true;
+    gui->remove(grabbedItemView);
+
+    inventoryDocument = assets->getLayout("core:inventory");
+    inventoryView = std::dynamic_pointer_cast<InventoryView>(inventoryDocument->getRoot());
+    inventoryView->bind(inventory, frontend, interaction.get());
+    scripting::on_ui_open(inventoryDocument, inventory.get());
+
+    gui->add(inventoryView);
+    gui->add(grabbedItemView);
+}
+
 void HudRenderer::closeInventory() {
+    scripting::on_ui_close(inventoryDocument, inventoryView->getInventory().get());
     inventoryOpen = false;
     ItemStack& grabbed = interaction->getGrabbedItem();
     grabbed.clear();
+    gui->remove(inventoryView);
+    inventoryView = nullptr;
+    inventoryDocument = nullptr;
 }
 
 void HudRenderer::draw(const GfxContext& ctx){
diff --git a/src/frontend/hud.h b/src/frontend/hud.h
index fe2e45a2..f9d12b6a 100644
--- a/src/frontend/hud.h
+++ b/src/frontend/hud.h
@@ -18,6 +18,7 @@ class Engine;
 class SlotView;
 class InventoryView;
 class LevelFrontend;
+class UiDocument;
 class InventoryInteraction;
 
 namespace gui {
@@ -40,7 +41,6 @@ class HudRenderer {
     std::shared_ptr<gui::Panel> contentAccessPanel;
     std::shared_ptr<InventoryView> contentAccess;
     std::shared_ptr<InventoryView> hotbarView;
-    std::shared_ptr<InventoryView> inventoryView;
 	std::shared_ptr<gui::UINode> debugPanel;
     std::shared_ptr<gui::Panel> darkOverlay;
     std::unique_ptr<InventoryInteraction> interaction;
@@ -48,10 +48,12 @@ class HudRenderer {
 	gui::GUI* gui;
 	LevelFrontend* frontend;
 
+    std::shared_ptr<InventoryView> inventoryView = nullptr;
+    UiDocument* inventoryDocument = nullptr;
+
     std::shared_ptr<gui::UINode> createDebugPanel(Engine* engine);
     std::shared_ptr<InventoryView> createContentAccess();
     std::shared_ptr<InventoryView> createHotbar();
-    std::shared_ptr<InventoryView> createInventory();
 public:
 	HudRenderer(Engine* engine, LevelFrontend* frontend);
 	~HudRenderer();
@@ -63,6 +65,7 @@ public:
 	bool isInventoryOpen() const;
 	bool isPause() const;
 
+    void openInventory();
     void closeInventory();
 };
 
diff --git a/src/logic/scripting/LuaState.cpp b/src/logic/scripting/LuaState.cpp
index c098ce70..229a1e00 100644
--- a/src/logic/scripting/LuaState.cpp
+++ b/src/logic/scripting/LuaState.cpp
@@ -16,6 +16,7 @@ lua::LuaState::LuaState() {
     luaopen_math(L);
     luaopen_string(L);
     luaopen_table(L);
+    luaopen_debug(L);
 
     std::cout << LUA_VERSION << std::endl;
 #   ifdef LUAJIT_VERSION
diff --git a/src/logic/scripting/scripting.cpp b/src/logic/scripting/scripting.cpp
index b9e27721..52ff33a8 100644
--- a/src/logic/scripting/scripting.cpp
+++ b/src/logic/scripting/scripting.cpp
@@ -60,8 +60,8 @@ void scripting::initialize(Engine* engine) {
 
 runnable scripting::create_runnable(
     int env,
-    const std::string& file,
-    const std::string& src
+    const std::string& src,
+    const std::string& file
 ) {
     return [=](){
         state->execute(env, src, file);
@@ -170,7 +170,7 @@ void scripting::on_block_broken(Player* player, const Block* block, int x, int y
 }
 
 bool scripting::on_block_interact(Player* player, const Block* block, int x, int y, int z) {
-    std::string name = block->name+".oninteract";
+    std::string name = block->name+".interact";
     if (state->getglobal(name)) {
         state->pushivec3(x, y, z);
         state->pushinteger(1); // playerid placeholder
@@ -205,8 +205,21 @@ bool scripting::on_item_break_block(Player* player, const ItemDef* item, int x,
     return false;
 }
 
+void scripting::on_ui_open(UiDocument* layout, Inventory* inventory) {
+    std::string name = layout->getId()+".open";
+    if (state->getglobal(name)) {
+        state->callNoThrow(0);
+    }
+}
+
+void scripting::on_ui_close(UiDocument* layout, Inventory* inventory) {
+    std::string name = layout->getId()+".close";
+    if (state->getglobal(name)) {
+        state->callNoThrow(0);
+    }
+}
+
 bool register_event(int env, const std::string& name, const std::string& id) {
-    std::cout << "register " << name << " -> " << id << std::endl;
     if (state->pushenv(env) == 0) {
         state->pushglobals();
     }
diff --git a/src/logic/scripting/scripting.h b/src/logic/scripting/scripting.h
index 1606bc30..ffac1dc0 100644
--- a/src/logic/scripting/scripting.h
+++ b/src/logic/scripting/scripting.h
@@ -14,6 +14,8 @@ class Level;
 class Block;
 class Player;
 class ItemDef;
+class Inventory;
+class UiDocument;
 struct block_funcs_set;
 struct item_funcs_set;
 struct uidocscript;
@@ -39,8 +41,8 @@ namespace scripting {
 
     runnable create_runnable(
         int env,
-        const std::string& filename,
-        const std::string& source
+        const std::string& src,
+        const std::string& file="<string>"
     );
     
     wstringconsumer create_wstring_consumer(
@@ -62,6 +64,8 @@ namespace scripting {
     bool on_block_interact(Player* player, const Block* block, int x, int y, int z);
     bool on_item_use_on_block(Player* player, const ItemDef* item, int x, int y, int z);
     bool on_item_break_block(Player* player, const ItemDef* item, int x, int y, int z);
+    void on_ui_open(UiDocument* layout, Inventory* inventory);
+    void on_ui_close(UiDocument* layout, Inventory* inventory);
     void load_block_script(int env, std::string prefix, fs::path file, block_funcs_set& funcsset);
     void load_item_script(int env, std::string prefix, fs::path file, item_funcs_set& funcsset);
     void load_world_script(int env, std::string prefix, fs::path file);