diff --git a/data/furniture-catalog.json b/data/furniture-catalog.json
new file mode 100644
index 0000000..17f04ef
--- /dev/null
+++ b/data/furniture-catalog.json
@@ -0,0 +1,1426 @@
+{
+  "version": "1.0",
+  "units": "meters",
+  "categories": [
+    "seating",
+    "tables",
+    "storage",
+    "beds",
+    "bathroom",
+    "kitchen",
+    "office",
+    "lighting",
+    "decor"
+  ],
+  "items": [
+    {
+      "id": "sofa-3seat",
+      "name": "3-Sitzer Sofa",
+      "category": "seating",
+      "rooms": ["wohnzimmer"],
+      "dimensions": { "width": 2.2, "depth": 0.9, "height": 0.85 },
+      "mesh": {
+        "type": "group",
+        "parts": [
+          {
+            "name": "base",
+            "geometry": "box",
+            "size": [2.2, 0.45, 0.9],
+            "position": [0, 0.225, 0],
+            "color": "#5a6e82"
+          },
+          {
+            "name": "backrest",
+            "geometry": "box",
+            "size": [2.2, 0.4, 0.15],
+            "position": [0, 0.65, -0.375],
+            "color": "#5a6e82"
+          },
+          {
+            "name": "armrest_left",
+            "geometry": "box",
+            "size": [0.15, 0.55, 0.9],
+            "position": [-1.025, 0.275, 0],
+            "color": "#4d5f70"
+          },
+          {
+            "name": "armrest_right",
+            "geometry": "box",
+            "size": [0.15, 0.55, 0.9],
+            "position": [1.025, 0.275, 0],
+            "color": "#4d5f70"
+          }
+        ]
+      }
+    },
+    {
+      "id": "sofa-2seat",
+      "name": "2-Sitzer Sofa",
+      "category": "seating",
+      "rooms": ["wohnzimmer", "arbeitszimmer"],
+      "dimensions": { "width": 1.6, "depth": 0.85, "height": 0.8 },
+      "mesh": {
+        "type": "group",
+        "parts": [
+          {
+            "name": "base",
+            "geometry": "box",
+            "size": [1.6, 0.4, 0.85],
+            "position": [0, 0.2, 0],
+            "color": "#5a6e82"
+          },
+          {
+            "name": "backrest",
+            "geometry": "box",
+            "size": [1.6, 0.4, 0.15],
+            "position": [0, 0.6, -0.35],
+            "color": "#5a6e82"
+          },
+          {
+            "name": "armrest_left",
+            "geometry": "box",
+            "size": [0.12, 0.5, 0.85],
+            "position": [-0.74, 0.25, 0],
+            "color": "#4d5f70"
+          },
+          {
+            "name": "armrest_right",
+            "geometry": "box",
+            "size": [0.12, 0.5, 0.85],
+            "position": [0.74, 0.25, 0],
+            "color": "#4d5f70"
+          }
+        ]
+      }
+    },
+    {
+      "id": "armchair",
+      "name": "Sessel",
+      "category": "seating",
+      "rooms": ["wohnzimmer", "arbeitszimmer", "schlafzimmer"],
+      "dimensions": { "width": 0.8, "depth": 0.8, "height": 0.85 },
+      "mesh": {
+        "type": "group",
+        "parts": [
+          {
+            "name": "base",
+            "geometry": "box",
+            "size": [0.8, 0.4, 0.8],
+            "position": [0, 0.2, 0],
+            "color": "#7a8a6e"
+          },
+          {
+            "name": "backrest",
+            "geometry": "box",
+            "size": [0.8, 0.45, 0.12],
+            "position": [0, 0.625, -0.34],
+            "color": "#7a8a6e"
+          },
+          {
+            "name": "armrest_left",
+            "geometry": "box",
+            "size": [0.1, 0.3, 0.7],
+            "position": [-0.35, 0.35, 0.05],
+            "color": "#6b7a5f"
+          },
+          {
+            "name": "armrest_right",
+            "geometry": "box",
+            "size": [0.1, 0.3, 0.7],
+            "position": [0.35, 0.35, 0.05],
+            "color": "#6b7a5f"
+          }
+        ]
+      }
+    },
+    {
+      "id": "dining-chair",
+      "name": "Esszimmerstuhl",
+      "category": "seating",
+      "rooms": ["esszimmer", "kueche"],
+      "dimensions": { "width": 0.45, "depth": 0.5, "height": 0.9 },
+      "mesh": {
+        "type": "group",
+        "parts": [
+          {
+            "name": "seat",
+            "geometry": "box",
+            "size": [0.45, 0.05, 0.45],
+            "position": [0, 0.45, 0],
+            "color": "#c4a97d"
+          },
+          {
+            "name": "backrest",
+            "geometry": "box",
+            "size": [0.42, 0.4, 0.03],
+            "position": [0, 0.7, -0.21],
+            "color": "#c4a97d"
+          },
+          {
+            "name": "leg_fl",
+            "geometry": "box",
+            "size": [0.04, 0.45, 0.04],
+            "position": [-0.18, 0.225, 0.18],
+            "color": "#8b7355"
+          },
+          {
+            "name": "leg_fr",
+            "geometry": "box",
+            "size": [0.04, 0.45, 0.04],
+            "position": [0.18, 0.225, 0.18],
+            "color": "#8b7355"
+          },
+          {
+            "name": "leg_bl",
+            "geometry": "box",
+            "size": [0.04, 0.45, 0.04],
+            "position": [-0.18, 0.225, -0.18],
+            "color": "#8b7355"
+          },
+          {
+            "name": "leg_br",
+            "geometry": "box",
+            "size": [0.04, 0.45, 0.04],
+            "position": [0.18, 0.225, -0.18],
+            "color": "#8b7355"
+          }
+        ]
+      }
+    },
+    {
+      "id": "coffee-table",
+      "name": "Couchtisch",
+      "category": "tables",
+      "rooms": ["wohnzimmer"],
+      "dimensions": { "width": 1.1, "depth": 0.6, "height": 0.45 },
+      "mesh": {
+        "type": "group",
+        "parts": [
+          {
+            "name": "top",
+            "geometry": "box",
+            "size": [1.1, 0.04, 0.6],
+            "position": [0, 0.43, 0],
+            "color": "#a0845c"
+          },
+          {
+            "name": "leg_fl",
+            "geometry": "box",
+            "size": [0.05, 0.41, 0.05],
+            "position": [-0.48, 0.205, 0.23],
+            "color": "#8b7355"
+          },
+          {
+            "name": "leg_fr",
+            "geometry": "box",
+            "size": [0.05, 0.41, 0.05],
+            "position": [0.48, 0.205, 0.23],
+            "color": "#8b7355"
+          },
+          {
+            "name": "leg_bl",
+            "geometry": "box",
+            "size": [0.05, 0.41, 0.05],
+            "position": [-0.48, 0.205, -0.23],
+            "color": "#8b7355"
+          },
+          {
+            "name": "leg_br",
+            "geometry": "box",
+            "size": [0.05, 0.41, 0.05],
+            "position": [0.48, 0.205, -0.23],
+            "color": "#8b7355"
+          }
+        ]
+      }
+    },
+    {
+      "id": "dining-table",
+      "name": "Esstisch",
+      "category": "tables",
+      "rooms": ["esszimmer", "kueche"],
+      "dimensions": { "width": 1.8, "depth": 0.9, "height": 0.75 },
+      "mesh": {
+        "type": "group",
+        "parts": [
+          {
+            "name": "top",
+            "geometry": "box",
+            "size": [1.8, 0.04, 0.9],
+            "position": [0, 0.73, 0],
+            "color": "#a0845c"
+          },
+          {
+            "name": "leg_fl",
+            "geometry": "box",
+            "size": [0.08, 0.71, 0.08],
+            "position": [-0.8, 0.355, 0.35],
+            "color": "#8b7355"
+          },
+          {
+            "name": "leg_fr",
+            "geometry": "box",
+            "size": [0.08, 0.71, 0.08],
+            "position": [0.8, 0.355, 0.35],
+            "color": "#8b7355"
+          },
+          {
+            "name": "leg_bl",
+            "geometry": "box",
+            "size": [0.08, 0.71, 0.08],
+            "position": [-0.8, 0.355, -0.35],
+            "color": "#8b7355"
+          },
+          {
+            "name": "leg_br",
+            "geometry": "box",
+            "size": [0.08, 0.71, 0.08],
+            "position": [0.8, 0.355, -0.35],
+            "color": "#8b7355"
+          }
+        ]
+      }
+    },
+    {
+      "id": "desk",
+      "name": "Schreibtisch",
+      "category": "tables",
+      "rooms": ["arbeitszimmer", "kinderzimmer"],
+      "dimensions": { "width": 1.4, "depth": 0.7, "height": 0.75 },
+      "mesh": {
+        "type": "group",
+        "parts": [
+          {
+            "name": "top",
+            "geometry": "box",
+            "size": [1.4, 0.03, 0.7],
+            "position": [0, 0.735, 0],
+            "color": "#b8a88a"
+          },
+          {
+            "name": "leg_left",
+            "geometry": "box",
+            "size": [0.04, 0.72, 0.65],
+            "position": [-0.66, 0.36, 0],
+            "color": "#8b7355"
+          },
+          {
+            "name": "leg_right",
+            "geometry": "box",
+            "size": [0.04, 0.72, 0.65],
+            "position": [0.66, 0.36, 0],
+            "color": "#8b7355"
+          },
+          {
+            "name": "drawer_unit",
+            "geometry": "box",
+            "size": [0.4, 0.5, 0.6],
+            "position": [0.46, 0.25, -0.02],
+            "color": "#a09080"
+          }
+        ]
+      }
+    },
+    {
+      "id": "nightstand",
+      "name": "Nachttisch",
+      "category": "tables",
+      "rooms": ["schlafzimmer", "kinderzimmer"],
+      "dimensions": { "width": 0.45, "depth": 0.4, "height": 0.55 },
+      "mesh": {
+        "type": "group",
+        "parts": [
+          {
+            "name": "body",
+            "geometry": "box",
+            "size": [0.45, 0.55, 0.4],
+            "position": [0, 0.275, 0],
+            "color": "#c4b59b"
+          },
+          {
+            "name": "drawer_face",
+            "geometry": "box",
+            "size": [0.4, 0.2, 0.02],
+            "position": [0, 0.35, 0.19],
+            "color": "#b0a08a"
+          }
+        ]
+      }
+    },
+    {
+      "id": "tv-stand",
+      "name": "TV-Lowboard",
+      "category": "storage",
+      "rooms": ["wohnzimmer"],
+      "dimensions": { "width": 1.6, "depth": 0.45, "height": 0.5 },
+      "mesh": {
+        "type": "group",
+        "parts": [
+          {
+            "name": "body",
+            "geometry": "box",
+            "size": [1.6, 0.5, 0.45],
+            "position": [0, 0.25, 0],
+            "color": "#f0ece4"
+          },
+          {
+            "name": "door_left",
+            "geometry": "box",
+            "size": [0.5, 0.35, 0.02],
+            "position": [-0.4, 0.2, 0.22],
+            "color": "#e0dcd4"
+          },
+          {
+            "name": "door_right",
+            "geometry": "box",
+            "size": [0.5, 0.35, 0.02],
+            "position": [0.4, 0.2, 0.22],
+            "color": "#e0dcd4"
+          }
+        ]
+      }
+    },
+    {
+      "id": "bookshelf",
+      "name": "Buecherregal",
+      "category": "storage",
+      "rooms": ["wohnzimmer", "arbeitszimmer", "kinderzimmer"],
+      "dimensions": { "width": 0.8, "depth": 0.3, "height": 1.85 },
+      "mesh": {
+        "type": "group",
+        "parts": [
+          {
+            "name": "frame_left",
+            "geometry": "box",
+            "size": [0.03, 1.85, 0.3],
+            "position": [-0.385, 0.925, 0],
+            "color": "#c4b59b"
+          },
+          {
+            "name": "frame_right",
+            "geometry": "box",
+            "size": [0.03, 1.85, 0.3],
+            "position": [0.385, 0.925, 0],
+            "color": "#c4b59b"
+          },
+          {
+            "name": "shelf_1",
+            "geometry": "box",
+            "size": [0.74, 0.02, 0.28],
+            "position": [0, 0.01, 0],
+            "color": "#b0a08a"
+          },
+          {
+            "name": "shelf_2",
+            "geometry": "box",
+            "size": [0.74, 0.02, 0.28],
+            "position": [0, 0.37, 0],
+            "color": "#b0a08a"
+          },
+          {
+            "name": "shelf_3",
+            "geometry": "box",
+            "size": [0.74, 0.02, 0.28],
+            "position": [0, 0.74, 0],
+            "color": "#b0a08a"
+          },
+          {
+            "name": "shelf_4",
+            "geometry": "box",
+            "size": [0.74, 0.02, 0.28],
+            "position": [0, 1.11, 0],
+            "color": "#b0a08a"
+          },
+          {
+            "name": "shelf_5",
+            "geometry": "box",
+            "size": [0.74, 0.02, 0.28],
+            "position": [0, 1.48, 0],
+            "color": "#b0a08a"
+          },
+          {
+            "name": "shelf_top",
+            "geometry": "box",
+            "size": [0.74, 0.02, 0.28],
+            "position": [0, 1.84, 0],
+            "color": "#b0a08a"
+          }
+        ]
+      }
+    },
+    {
+      "id": "wardrobe",
+      "name": "Kleiderschrank",
+      "category": "storage",
+      "rooms": ["schlafzimmer", "kinderzimmer"],
+      "dimensions": { "width": 2.0, "depth": 0.6, "height": 2.2 },
+      "mesh": {
+        "type": "group",
+        "parts": [
+          {
+            "name": "body",
+            "geometry": "box",
+            "size": [2.0, 2.2, 0.6],
+            "position": [0, 1.1, 0],
+            "color": "#f0ece4"
+          },
+          {
+            "name": "door_left",
+            "geometry": "box",
+            "size": [0.98, 2.1, 0.02],
+            "position": [-0.5, 1.1, 0.29],
+            "color": "#e8e4dc"
+          },
+          {
+            "name": "door_right",
+            "geometry": "box",
+            "size": [0.98, 2.1, 0.02],
+            "position": [0.5, 1.1, 0.29],
+            "color": "#e8e4dc"
+          },
+          {
+            "name": "handle_left",
+            "geometry": "box",
+            "size": [0.02, 0.12, 0.03],
+            "position": [-0.05, 1.1, 0.31],
+            "color": "#888888"
+          },
+          {
+            "name": "handle_right",
+            "geometry": "box",
+            "size": [0.02, 0.12, 0.03],
+            "position": [0.05, 1.1, 0.31],
+            "color": "#888888"
+          }
+        ]
+      }
+    },
+    {
+      "id": "shoe-cabinet",
+      "name": "Schuhschrank",
+      "category": "storage",
+      "rooms": ["flur"],
+      "dimensions": { "width": 0.9, "depth": 0.35, "height": 1.1 },
+      "mesh": {
+        "type": "group",
+        "parts": [
+          {
+            "name": "body",
+            "geometry": "box",
+            "size": [0.9, 1.1, 0.35],
+            "position": [0, 0.55, 0],
+            "color": "#f0ece4"
+          },
+          {
+            "name": "door",
+            "geometry": "box",
+            "size": [0.86, 1.0, 0.02],
+            "position": [0, 0.55, 0.165],
+            "color": "#e8e4dc"
+          }
+        ]
+      }
+    },
+    {
+      "id": "coat-rack",
+      "name": "Garderobe",
+      "category": "storage",
+      "rooms": ["flur"],
+      "dimensions": { "width": 0.8, "depth": 0.3, "height": 1.8 },
+      "mesh": {
+        "type": "group",
+        "parts": [
+          {
+            "name": "panel",
+            "geometry": "box",
+            "size": [0.8, 1.8, 0.04],
+            "position": [0, 0.9, 0],
+            "color": "#a0845c"
+          },
+          {
+            "name": "hook_1",
+            "geometry": "box",
+            "size": [0.04, 0.04, 0.08],
+            "position": [-0.25, 1.55, 0.06],
+            "color": "#888888"
+          },
+          {
+            "name": "hook_2",
+            "geometry": "box",
+            "size": [0.04, 0.04, 0.08],
+            "position": [0, 1.55, 0.06],
+            "color": "#888888"
+          },
+          {
+            "name": "hook_3",
+            "geometry": "box",
+            "size": [0.04, 0.04, 0.08],
+            "position": [0.25, 1.55, 0.06],
+            "color": "#888888"
+          },
+          {
+            "name": "shelf",
+            "geometry": "box",
+            "size": [0.8, 0.03, 0.25],
+            "position": [0, 1.7, 0.1],
+            "color": "#a0845c"
+          }
+        ]
+      }
+    },
+    {
+      "id": "sideboard",
+      "name": "Sideboard",
+      "category": "storage",
+      "rooms": ["wohnzimmer", "esszimmer", "flur"],
+      "dimensions": { "width": 1.5, "depth": 0.4, "height": 0.85 },
+      "mesh": {
+        "type": "group",
+        "parts": [
+          {
+            "name": "body",
+            "geometry": "box",
+            "size": [1.5, 0.85, 0.4],
+            "position": [0, 0.425, 0],
+            "color": "#f0ece4"
+          },
+          {
+            "name": "door_left",
+            "geometry": "box",
+            "size": [0.48, 0.6, 0.02],
+            "position": [-0.37, 0.35, 0.19],
+            "color": "#e0dcd4"
+          },
+          {
+            "name": "door_right",
+            "geometry": "box",
+            "size": [0.48, 0.6, 0.02],
+            "position": [0.37, 0.35, 0.19],
+            "color": "#e0dcd4"
+          }
+        ]
+      }
+    },
+    {
+      "id": "double-bed",
+      "name": "Doppelbett",
+      "category": "beds",
+      "rooms": ["schlafzimmer"],
+      "dimensions": { "width": 1.8, "depth": 2.1, "height": 0.45 },
+      "mesh": {
+        "type": "group",
+        "parts": [
+          {
+            "name": "frame",
+            "geometry": "box",
+            "size": [1.8, 0.3, 2.1],
+            "position": [0, 0.15, 0],
+            "color": "#c4b59b"
+          },
+          {
+            "name": "mattress",
+            "geometry": "box",
+            "size": [1.7, 0.2, 2.0],
+            "position": [0, 0.4, 0],
+            "color": "#f5f0eb"
+          },
+          {
+            "name": "headboard",
+            "geometry": "box",
+            "size": [1.8, 0.6, 0.06],
+            "position": [0, 0.6, -1.02],
+            "color": "#a09080"
+          },
+          {
+            "name": "pillow_left",
+            "geometry": "box",
+            "size": [0.6, 0.08, 0.4],
+            "position": [-0.4, 0.54, -0.7],
+            "color": "#ffffff"
+          },
+          {
+            "name": "pillow_right",
+            "geometry": "box",
+            "size": [0.6, 0.08, 0.4],
+            "position": [0.4, 0.54, -0.7],
+            "color": "#ffffff"
+          }
+        ]
+      }
+    },
+    {
+      "id": "single-bed",
+      "name": "Einzelbett",
+      "category": "beds",
+      "rooms": ["kinderzimmer"],
+      "dimensions": { "width": 0.9, "depth": 2.0, "height": 0.45 },
+      "mesh": {
+        "type": "group",
+        "parts": [
+          {
+            "name": "frame",
+            "geometry": "box",
+            "size": [0.9, 0.3, 2.0],
+            "position": [0, 0.15, 0],
+            "color": "#c4b59b"
+          },
+          {
+            "name": "mattress",
+            "geometry": "box",
+            "size": [0.85, 0.2, 1.9],
+            "position": [0, 0.4, 0],
+            "color": "#f5f0eb"
+          },
+          {
+            "name": "headboard",
+            "geometry": "box",
+            "size": [0.9, 0.5, 0.05],
+            "position": [0, 0.55, -0.975],
+            "color": "#a09080"
+          },
+          {
+            "name": "pillow",
+            "geometry": "box",
+            "size": [0.5, 0.08, 0.35],
+            "position": [0, 0.54, -0.7],
+            "color": "#ffffff"
+          }
+        ]
+      }
+    },
+    {
+      "id": "office-chair",
+      "name": "Buerostuhl",
+      "category": "seating",
+      "rooms": ["arbeitszimmer"],
+      "dimensions": { "width": 0.65, "depth": 0.65, "height": 1.1 },
+      "mesh": {
+        "type": "group",
+        "parts": [
+          {
+            "name": "seat",
+            "geometry": "box",
+            "size": [0.5, 0.08, 0.5],
+            "position": [0, 0.48, 0],
+            "color": "#333333"
+          },
+          {
+            "name": "backrest",
+            "geometry": "box",
+            "size": [0.48, 0.5, 0.06],
+            "position": [0, 0.8, -0.22],
+            "color": "#333333"
+          },
+          {
+            "name": "pedestal",
+            "geometry": "cylinder",
+            "radius": 0.03,
+            "height": 0.44,
+            "position": [0, 0.22, 0],
+            "color": "#666666"
+          },
+          {
+            "name": "base",
+            "geometry": "cylinder",
+            "radius": 0.3,
+            "height": 0.04,
+            "position": [0, 0.02, 0],
+            "color": "#444444"
+          }
+        ]
+      }
+    },
+    {
+      "id": "kitchen-counter",
+      "name": "Kuechenzeile",
+      "category": "kitchen",
+      "rooms": ["kueche"],
+      "dimensions": { "width": 2.4, "depth": 0.6, "height": 0.9 },
+      "mesh": {
+        "type": "group",
+        "parts": [
+          {
+            "name": "cabinet",
+            "geometry": "box",
+            "size": [2.4, 0.85, 0.6],
+            "position": [0, 0.425, 0],
+            "color": "#f0ece4"
+          },
+          {
+            "name": "countertop",
+            "geometry": "box",
+            "size": [2.4, 0.04, 0.62],
+            "position": [0, 0.87, 0],
+            "color": "#888888"
+          },
+          {
+            "name": "door_1",
+            "geometry": "box",
+            "size": [0.55, 0.7, 0.02],
+            "position": [-0.85, 0.4, 0.29],
+            "color": "#e0dcd4"
+          },
+          {
+            "name": "door_2",
+            "geometry": "box",
+            "size": [0.55, 0.7, 0.02],
+            "position": [-0.28, 0.4, 0.29],
+            "color": "#e0dcd4"
+          },
+          {
+            "name": "door_3",
+            "geometry": "box",
+            "size": [0.55, 0.7, 0.02],
+            "position": [0.28, 0.4, 0.29],
+            "color": "#e0dcd4"
+          },
+          {
+            "name": "door_4",
+            "geometry": "box",
+            "size": [0.55, 0.7, 0.02],
+            "position": [0.85, 0.4, 0.29],
+            "color": "#e0dcd4"
+          }
+        ]
+      }
+    },
+    {
+      "id": "kitchen-wall-cabinet",
+      "name": "Haengeschrank",
+      "category": "kitchen",
+      "rooms": ["kueche"],
+      "dimensions": { "width": 2.4, "depth": 0.35, "height": 0.7 },
+      "mesh": {
+        "type": "group",
+        "parts": [
+          {
+            "name": "body",
+            "geometry": "box",
+            "size": [2.4, 0.7, 0.35],
+            "position": [0, 1.75, 0],
+            "color": "#f0ece4"
+          },
+          {
+            "name": "door_left",
+            "geometry": "box",
+            "size": [1.18, 0.66, 0.02],
+            "position": [-0.6, 1.75, 0.165],
+            "color": "#e0dcd4"
+          },
+          {
+            "name": "door_right",
+            "geometry": "box",
+            "size": [1.18, 0.66, 0.02],
+            "position": [0.6, 1.75, 0.165],
+            "color": "#e0dcd4"
+          }
+        ]
+      }
+    },
+    {
+      "id": "fridge",
+      "name": "Kuehlschrank",
+      "category": "kitchen",
+      "rooms": ["kueche"],
+      "dimensions": { "width": 0.6, "depth": 0.65, "height": 1.8 },
+      "mesh": {
+        "type": "group",
+        "parts": [
+          {
+            "name": "body",
+            "geometry": "box",
+            "size": [0.6, 1.8, 0.65],
+            "position": [0, 0.9, 0],
+            "color": "#e0e0e0"
+          },
+          {
+            "name": "door_upper",
+            "geometry": "box",
+            "size": [0.58, 1.1, 0.02],
+            "position": [0, 1.25, 0.315],
+            "color": "#d0d0d0"
+          },
+          {
+            "name": "door_lower",
+            "geometry": "box",
+            "size": [0.58, 0.6, 0.02],
+            "position": [0, 0.35, 0.315],
+            "color": "#d0d0d0"
+          },
+          {
+            "name": "handle_upper",
+            "geometry": "box",
+            "size": [0.02, 0.2, 0.03],
+            "position": [0.25, 1.25, 0.34],
+            "color": "#aaaaaa"
+          },
+          {
+            "name": "handle_lower",
+            "geometry": "box",
+            "size": [0.02, 0.15, 0.03],
+            "position": [0.25, 0.5, 0.34],
+            "color": "#aaaaaa"
+          }
+        ]
+      }
+    },
+    {
+      "id": "toilet",
+      "name": "Toilette",
+      "category": "bathroom",
+      "rooms": ["badezimmer", "gaeste_wc"],
+      "dimensions": { "width": 0.4, "depth": 0.65, "height": 0.45 },
+      "mesh": {
+        "type": "group",
+        "parts": [
+          {
+            "name": "bowl",
+            "geometry": "box",
+            "size": [0.38, 0.38, 0.55],
+            "position": [0, 0.19, 0.05],
+            "color": "#ffffff"
+          },
+          {
+            "name": "tank",
+            "geometry": "box",
+            "size": [0.36, 0.45, 0.18],
+            "position": [0, 0.225, -0.235],
+            "color": "#ffffff"
+          },
+          {
+            "name": "seat",
+            "geometry": "box",
+            "size": [0.36, 0.03, 0.42],
+            "position": [0, 0.4, 0.1],
+            "color": "#f5f5f5"
+          }
+        ]
+      }
+    },
+    {
+      "id": "sink-bathroom",
+      "name": "Waschbecken",
+      "category": "bathroom",
+      "rooms": ["badezimmer", "gaeste_wc"],
+      "dimensions": { "width": 0.6, "depth": 0.45, "height": 0.85 },
+      "mesh": {
+        "type": "group",
+        "parts": [
+          {
+            "name": "vanity",
+            "geometry": "box",
+            "size": [0.6, 0.6, 0.45],
+            "position": [0, 0.3, 0],
+            "color": "#f0ece4"
+          },
+          {
+            "name": "basin",
+            "geometry": "box",
+            "size": [0.55, 0.15, 0.4],
+            "position": [0, 0.75, 0],
+            "color": "#ffffff"
+          },
+          {
+            "name": "faucet",
+            "geometry": "cylinder",
+            "radius": 0.015,
+            "height": 0.2,
+            "position": [0, 0.9, -0.12],
+            "color": "#cccccc"
+          }
+        ]
+      }
+    },
+    {
+      "id": "bathtub",
+      "name": "Badewanne",
+      "category": "bathroom",
+      "rooms": ["badezimmer"],
+      "dimensions": { "width": 0.75, "depth": 1.7, "height": 0.6 },
+      "mesh": {
+        "type": "group",
+        "parts": [
+          {
+            "name": "outer",
+            "geometry": "box",
+            "size": [0.75, 0.6, 1.7],
+            "position": [0, 0.3, 0],
+            "color": "#ffffff"
+          },
+          {
+            "name": "inner",
+            "geometry": "box",
+            "size": [0.65, 0.5, 1.6],
+            "position": [0, 0.35, 0],
+            "color": "#f0f0f0"
+          }
+        ]
+      }
+    },
+    {
+      "id": "shower",
+      "name": "Dusche",
+      "category": "bathroom",
+      "rooms": ["badezimmer"],
+      "dimensions": { "width": 0.9, "depth": 0.9, "height": 2.1 },
+      "mesh": {
+        "type": "group",
+        "parts": [
+          {
+            "name": "tray",
+            "geometry": "box",
+            "size": [0.9, 0.05, 0.9],
+            "position": [0, 0.025, 0],
+            "color": "#f0f0f0"
+          },
+          {
+            "name": "glass_left",
+            "geometry": "box",
+            "size": [0.02, 2.0, 0.88],
+            "position": [-0.44, 1.05, 0],
+            "color": "#c8e0e8"
+          },
+          {
+            "name": "glass_front",
+            "geometry": "box",
+            "size": [0.88, 2.0, 0.02],
+            "position": [0, 1.05, 0.44],
+            "color": "#c8e0e8"
+          },
+          {
+            "name": "showerhead",
+            "geometry": "cylinder",
+            "radius": 0.06,
+            "height": 0.03,
+            "position": [0, 2.0, -0.25],
+            "color": "#cccccc"
+          }
+        ]
+      }
+    },
+    {
+      "id": "bathroom-cabinet",
+      "name": "Badezimmerschrank",
+      "category": "bathroom",
+      "rooms": ["badezimmer"],
+      "dimensions": { "width": 0.6, "depth": 0.2, "height": 0.7 },
+      "mesh": {
+        "type": "group",
+        "parts": [
+          {
+            "name": "body",
+            "geometry": "box",
+            "size": [0.6, 0.7, 0.2],
+            "position": [0, 1.5, 0],
+            "color": "#f0ece4"
+          },
+          {
+            "name": "mirror",
+            "geometry": "box",
+            "size": [0.56, 0.66, 0.01],
+            "position": [0, 1.5, 0.095],
+            "color": "#d4e8f0"
+          }
+        ]
+      }
+    },
+    {
+      "id": "washing-machine",
+      "name": "Waschmaschine",
+      "category": "bathroom",
+      "rooms": ["badezimmer"],
+      "dimensions": { "width": 0.6, "depth": 0.6, "height": 0.85 },
+      "mesh": {
+        "type": "group",
+        "parts": [
+          {
+            "name": "body",
+            "geometry": "box",
+            "size": [0.6, 0.85, 0.6],
+            "position": [0, 0.425, 0],
+            "color": "#e8e8e8"
+          },
+          {
+            "name": "door",
+            "geometry": "cylinder",
+            "radius": 0.2,
+            "height": 0.03,
+            "position": [0, 0.45, 0.3],
+            "color": "#cccccc"
+          },
+          {
+            "name": "panel",
+            "geometry": "box",
+            "size": [0.56, 0.1, 0.02],
+            "position": [0, 0.78, 0.29],
+            "color": "#d0d0d0"
+          }
+        ]
+      }
+    },
+    {
+      "id": "rug-large",
+      "name": "Teppich gross",
+      "category": "decor",
+      "rooms": ["wohnzimmer", "schlafzimmer"],
+      "dimensions": { "width": 2.0, "depth": 3.0, "height": 0.02 },
+      "mesh": {
+        "type": "group",
+        "parts": [
+          {
+            "name": "rug",
+            "geometry": "box",
+            "size": [2.0, 0.02, 3.0],
+            "position": [0, 0.01, 0],
+            "color": "#8b6d5c"
+          }
+        ]
+      }
+    },
+    {
+      "id": "rug-small",
+      "name": "Teppich klein",
+      "category": "decor",
+      "rooms": ["kinderzimmer", "flur"],
+      "dimensions": { "width": 1.2, "depth": 1.7, "height": 0.02 },
+      "mesh": {
+        "type": "group",
+        "parts": [
+          {
+            "name": "rug",
+            "geometry": "box",
+            "size": [1.2, 0.02, 1.7],
+            "position": [0, 0.01, 0],
+            "color": "#a07060"
+          }
+        ]
+      }
+    },
+    {
+      "id": "floor-lamp",
+      "name": "Stehlampe",
+      "category": "lighting",
+      "rooms": ["wohnzimmer", "schlafzimmer", "arbeitszimmer"],
+      "dimensions": { "width": 0.35, "depth": 0.35, "height": 1.65 },
+      "mesh": {
+        "type": "group",
+        "parts": [
+          {
+            "name": "base",
+            "geometry": "cylinder",
+            "radius": 0.15,
+            "height": 0.03,
+            "position": [0, 0.015, 0],
+            "color": "#444444"
+          },
+          {
+            "name": "pole",
+            "geometry": "cylinder",
+            "radius": 0.015,
+            "height": 1.4,
+            "position": [0, 0.73, 0],
+            "color": "#444444"
+          },
+          {
+            "name": "shade",
+            "geometry": "cylinder",
+            "radius": 0.17,
+            "height": 0.25,
+            "position": [0, 1.53, 0],
+            "color": "#f5e6c8"
+          }
+        ]
+      }
+    },
+    {
+      "id": "desk-lamp",
+      "name": "Schreibtischlampe",
+      "category": "lighting",
+      "rooms": ["arbeitszimmer", "kinderzimmer", "schlafzimmer"],
+      "dimensions": { "width": 0.2, "depth": 0.2, "height": 0.45 },
+      "mesh": {
+        "type": "group",
+        "parts": [
+          {
+            "name": "base",
+            "geometry": "cylinder",
+            "radius": 0.08,
+            "height": 0.02,
+            "position": [0, 0.01, 0],
+            "color": "#333333"
+          },
+          {
+            "name": "arm",
+            "geometry": "cylinder",
+            "radius": 0.01,
+            "height": 0.35,
+            "position": [0, 0.19, 0],
+            "color": "#333333"
+          },
+          {
+            "name": "shade",
+            "geometry": "cylinder",
+            "radius": 0.09,
+            "height": 0.1,
+            "position": [0, 0.4, 0],
+            "color": "#333333"
+          }
+        ]
+      }
+    },
+    {
+      "id": "tv",
+      "name": "Fernseher",
+      "category": "decor",
+      "rooms": ["wohnzimmer"],
+      "dimensions": { "width": 1.2, "depth": 0.08, "height": 0.7 },
+      "mesh": {
+        "type": "group",
+        "parts": [
+          {
+            "name": "screen",
+            "geometry": "box",
+            "size": [1.2, 0.7, 0.04],
+            "position": [0, 0.85, 0],
+            "color": "#1a1a1a"
+          },
+          {
+            "name": "bezel",
+            "geometry": "box",
+            "size": [1.22, 0.72, 0.03],
+            "position": [0, 0.85, -0.005],
+            "color": "#111111"
+          },
+          {
+            "name": "stand",
+            "geometry": "box",
+            "size": [0.3, 0.04, 0.15],
+            "position": [0, 0.48, 0],
+            "color": "#222222"
+          }
+        ]
+      }
+    },
+    {
+      "id": "plant-large",
+      "name": "Zimmerpflanze gross",
+      "category": "decor",
+      "rooms": ["wohnzimmer", "flur", "arbeitszimmer"],
+      "dimensions": { "width": 0.4, "depth": 0.4, "height": 1.2 },
+      "mesh": {
+        "type": "group",
+        "parts": [
+          {
+            "name": "pot",
+            "geometry": "cylinder",
+            "radius": 0.15,
+            "height": 0.3,
+            "position": [0, 0.15, 0],
+            "color": "#8b6050"
+          },
+          {
+            "name": "foliage",
+            "geometry": "cylinder",
+            "radius": 0.2,
+            "height": 0.8,
+            "position": [0, 0.8, 0],
+            "color": "#3d7a3d"
+          }
+        ]
+      }
+    },
+    {
+      "id": "plant-small",
+      "name": "Zimmerpflanze klein",
+      "category": "decor",
+      "rooms": ["arbeitszimmer", "badezimmer", "schlafzimmer"],
+      "dimensions": { "width": 0.2, "depth": 0.2, "height": 0.35 },
+      "mesh": {
+        "type": "group",
+        "parts": [
+          {
+            "name": "pot",
+            "geometry": "cylinder",
+            "radius": 0.08,
+            "height": 0.15,
+            "position": [0, 0.075, 0],
+            "color": "#8b6050"
+          },
+          {
+            "name": "foliage",
+            "geometry": "cylinder",
+            "radius": 0.1,
+            "height": 0.2,
+            "position": [0, 0.25, 0],
+            "color": "#4a8b4a"
+          }
+        ]
+      }
+    },
+    {
+      "id": "kitchen-island",
+      "name": "Kochinsel",
+      "category": "kitchen",
+      "rooms": ["kueche"],
+      "dimensions": { "width": 1.5, "depth": 0.8, "height": 0.9 },
+      "mesh": {
+        "type": "group",
+        "parts": [
+          {
+            "name": "cabinet",
+            "geometry": "box",
+            "size": [1.5, 0.85, 0.8],
+            "position": [0, 0.425, 0],
+            "color": "#f0ece4"
+          },
+          {
+            "name": "countertop",
+            "geometry": "box",
+            "size": [1.6, 0.04, 0.9],
+            "position": [0, 0.87, 0],
+            "color": "#888888"
+          }
+        ]
+      }
+    },
+    {
+      "id": "kids-shelf",
+      "name": "Kinderregal",
+      "category": "storage",
+      "rooms": ["kinderzimmer"],
+      "dimensions": { "width": 0.8, "depth": 0.3, "height": 1.1 },
+      "mesh": {
+        "type": "group",
+        "parts": [
+          {
+            "name": "frame",
+            "geometry": "box",
+            "size": [0.8, 1.1, 0.3],
+            "position": [0, 0.55, 0],
+            "color": "#f0ece4"
+          },
+          {
+            "name": "shelf_1",
+            "geometry": "box",
+            "size": [0.74, 0.02, 0.28],
+            "position": [0, 0.27, 0],
+            "color": "#e0dcd4"
+          },
+          {
+            "name": "shelf_2",
+            "geometry": "box",
+            "size": [0.74, 0.02, 0.28],
+            "position": [0, 0.55, 0],
+            "color": "#e0dcd4"
+          },
+          {
+            "name": "shelf_3",
+            "geometry": "box",
+            "size": [0.74, 0.02, 0.28],
+            "position": [0, 0.83, 0],
+            "color": "#e0dcd4"
+          }
+        ]
+      }
+    },
+    {
+      "id": "kids-wardrobe",
+      "name": "Kinderschrank",
+      "category": "storage",
+      "rooms": ["kinderzimmer"],
+      "dimensions": { "width": 1.2, "depth": 0.55, "height": 1.6 },
+      "mesh": {
+        "type": "group",
+        "parts": [
+          {
+            "name": "body",
+            "geometry": "box",
+            "size": [1.2, 1.6, 0.55],
+            "position": [0, 0.8, 0],
+            "color": "#f0ece4"
+          },
+          {
+            "name": "door_left",
+            "geometry": "box",
+            "size": [0.58, 1.5, 0.02],
+            "position": [-0.3, 0.8, 0.265],
+            "color": "#e8e4dc"
+          },
+          {
+            "name": "door_right",
+            "geometry": "box",
+            "size": [0.58, 1.5, 0.02],
+            "position": [0.3, 0.8, 0.265],
+            "color": "#e8e4dc"
+          }
+        ]
+      }
+    },
+    {
+      "id": "console-table",
+      "name": "Konsolentisch",
+      "category": "tables",
+      "rooms": ["flur"],
+      "dimensions": { "width": 1.0, "depth": 0.3, "height": 0.8 },
+      "mesh": {
+        "type": "group",
+        "parts": [
+          {
+            "name": "top",
+            "geometry": "box",
+            "size": [1.0, 0.03, 0.3],
+            "position": [0, 0.785, 0],
+            "color": "#a0845c"
+          },
+          {
+            "name": "leg_left",
+            "geometry": "box",
+            "size": [0.04, 0.77, 0.04],
+            "position": [-0.44, 0.385, 0],
+            "color": "#8b7355"
+          },
+          {
+            "name": "leg_right",
+            "geometry": "box",
+            "size": [0.04, 0.77, 0.04],
+            "position": [0.44, 0.385, 0],
+            "color": "#8b7355"
+          },
+          {
+            "name": "stretcher",
+            "geometry": "box",
+            "size": [0.84, 0.03, 0.25],
+            "position": [0, 0.15, 0],
+            "color": "#a0845c"
+          }
+        ]
+      }
+    },
+    {
+      "id": "mirror-hall",
+      "name": "Wandspiegel",
+      "category": "decor",
+      "rooms": ["flur", "badezimmer"],
+      "dimensions": { "width": 0.5, "depth": 0.03, "height": 1.2 },
+      "mesh": {
+        "type": "group",
+        "parts": [
+          {
+            "name": "frame",
+            "geometry": "box",
+            "size": [0.54, 1.24, 0.03],
+            "position": [0, 1.4, 0],
+            "color": "#8b7355"
+          },
+          {
+            "name": "glass",
+            "geometry": "box",
+            "size": [0.5, 1.2, 0.01],
+            "position": [0, 1.4, 0.01],
+            "color": "#d4e8f0"
+          }
+        ]
+      }
+    }
+  ]
+}