diff --git a/doc/en/scripting/builtins/libhud.md b/doc/en/scripting/builtins/libhud.md
index 963e428c..72b1a4ed 100644
--- a/doc/en/scripting/builtins/libhud.md
+++ b/doc/en/scripting/builtins/libhud.md
@@ -8,8 +8,17 @@ hud.open_inventory()
 hud.close_inventory()
 
 -- Open UI and inventory.
--- Throws an exception if has no UI layout.
-hud.open(invid: int, layoutid: str)
+-- Throws an exception if has UI layout does not exists.
+-- If invid is not specified, a virtual (temporary) inventory is created.
+-- Returns the invid or id of the virtual inventory.
+hud.open(
+    -- UI layout name
+    layoutid: str, 
+    -- Don't open player inventory
+    [optional] disablePlayerInventory: bool, 
+    -- Inventory that UI layout will be bound to
+    [optional] invid: int
+) -> int
 
 -- Open block UI and inventory.
 -- Throws an exception if block has no UI layout.
diff --git a/doc/ru/scripting/builtins/libhud.md b/doc/ru/scripting/builtins/libhud.md
index 4bf14d99..d43867ac 100644
--- a/doc/ru/scripting/builtins/libhud.md
+++ b/doc/ru/scripting/builtins/libhud.md
@@ -8,8 +8,18 @@ hud.open_inventory()
 hud.close_inventory()
 
 -- Открывает инвентарь и UI.
--- Если не имеет макета UI - бросается исключение.
-hud.open(invid: int, layoutid: str)
+-- Если макет UI не существует - бросается исключение.
+-- Если invid не указан, создаётся виртуальный (временный) инвентарь.
+-- Возвращает invid или id виртуального инвентаря.
+hud.open(
+    -- Макет UI
+    layoutid: str, 
+    -- Не открывать инвентарь игрока
+    [опционально] disablePlayerInventory: bool, 
+    -- Инвентарь, к которому будет привязан UI макет
+    [опционально] invid: int
+) -> int
+
 
 -- Открывает инвентарь и UI блока.
 -- Если блок не имеет макета UI - бросается исключение.
diff --git a/src/frontend/hud.cpp b/src/frontend/hud.cpp
index cc9c54d0..30659969 100644
--- a/src/frontend/hud.cpp
+++ b/src/frontend/hud.cpp
@@ -382,16 +382,11 @@ void Hud::openInventory() {
     add(HudElement(hud_element_mode::inventory_bound, nullptr, exchangeSlot, false));
 }
 
-void Hud::openInventory(
+std::shared_ptr<Inventory> Hud::openInventory(
     UiDocument* doc,
     std::shared_ptr<Inventory> inv,
     bool playerInventory
 ) {
-    if (inv == nullptr) {
-        // why try to open nox-existent inventory??
-        return;
-    }
-
     if (isInventoryOpen()) {
         closeInventory();
     }
@@ -413,6 +408,7 @@ void Hud::openInventory(
     }
     secondInvView->bind(inv, content);
     add(HudElement(hud_element_mode::inventory_bound, doc, secondUI, false));
+    return inv;
 }
 
 void Hud::openInventory(
diff --git a/src/frontend/hud.hpp b/src/frontend/hud.hpp
index 4a2ecfd5..580ab54d 100644
--- a/src/frontend/hud.hpp
+++ b/src/frontend/hud.hpp
@@ -153,7 +153,7 @@ public:
     /// @param doc ui layout
     /// @param inv inventory
     /// @param playerInventory show player inventory too
-    void openInventory(
+    std::shared_ptr<Inventory> openInventory(
         UiDocument* doc,
         std::shared_ptr<Inventory> inv,
         bool playerInventory
diff --git a/src/logic/scripting/lua/libs/libhud.cpp b/src/logic/scripting/lua/libs/libhud.cpp
index 460cf66b..7f5ec46d 100644
--- a/src/logic/scripting/lua/libs/libhud.cpp
+++ b/src/logic/scripting/lua/libs/libhud.cpp
@@ -37,23 +37,20 @@ static int l_close_inventory(lua::State*) {
 }
 
 static int l_open(lua::State* L) {
-    auto invid = lua::tointeger(L, 1);
-    auto layoutid = lua::require_string(L, 2);
-    bool playerInventory = !lua::toboolean(L, 3);
+    auto layoutid = lua::require_string(L, 1);
+    bool playerInventory = !lua::toboolean(L, 2);
+    auto invid = lua::tointeger(L, 3);
 
     auto assets = engine->getAssets();
     auto layout = assets->get<UiDocument>(layoutid);
     if (layout == nullptr) {
         throw std::runtime_error("there is no ui layout " + util::quote(layoutid));
     }
-
-    hud->openInventory(
+    return lua::pushinteger(L, hud->openInventory(
         layout,
         level->inventories->get(invid),
         playerInventory
-    );
-
-    return 0;
+    )->getId());
 }
 
 static int l_open_block(lua::State* L) {