🆙 more optimization mem.

packages/room/src/RoomMessageHandler.ts

@@ -110,6 +110,12 @@ export class RoomMessageHandler
         this._latestEntryTileEvent = null;
         this._activeWiredUserMovements.clear();
         this._activeRoomUserWalks.clear();
+
+        if(this._planeParser)
+        {
+            this._planeParser.dispose();
+            this._planeParser = null;
+        }
     }
 
     public setRoomId(id: number): void

packages/room/src/object/visualization/furniture/IsometricImageFurniVisualization.ts

@@ -105,6 +105,7 @@ export class IsometricImageFurniVisualization extends FurnitureAnimatedVisualiza
             const sprite = this.getSprite(layerId);
             if (sprite) {
                 sprite.texture = this._thumbnailTexture;
+                sprite.offsetY -= 1;
             }
         }
     }

packages/room/src/utils/RoomInstanceData.ts

@@ -39,7 +39,44 @@ export class RoomInstanceData
 
     public dispose(): void
     {
-        return;
+        if(this._selectedObject)
+        {
+            this._selectedObject.dispose();
+            this._selectedObject = null;
+        }
+
+        if(this._placedObject)
+        {
+            this._placedObject.dispose();
+            this._placedObject = null;
+        }
+
+        if(this._furnitureStackingHeightMap)
+        {
+            this._furnitureStackingHeightMap.dispose();
+            this._furnitureStackingHeightMap = null;
+        }
+
+        if(this._tileObjectMap)
+        {
+            this._tileObjectMap.dispose();
+            this._tileObjectMap = null;
+        }
+
+        if(this._legacyGeometry)
+        {
+            this._legacyGeometry = null;
+        }
+
+        if(this._roomCamera)
+        {
+            this._roomCamera = null;
+        }
+
+        this._floorStack.clear();
+        this._wallStack.clear();
+        this._mouseButtonCursorOwners = [];
+        this._modelName = null;
     }
 
     public setModelName(name: string): void