diff --git a/objects/Billboard.md b/objects/Billboard.md
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+# Billboard
+
+### Type
+pre-defined
+
+### 3D
+The Billboard is a 4m x 2,25m opaque Plane.
+Its Origin is at the Bottom-Center.
+Spawnpoint should be {0,1,0} so its 1m above the floor.
+
+### Custom Args:
+| Key | Type | Implemented | Description |
+|---|---|---|---|
+| url | string | ✔️ | Storage path within `user_files` bucket (e.g. `uuid/image.png`). A signed URL is generated at runtime. |
+| grabable | `"true"` / `"false"` | ⚠️ (Unity missing) | Whether the item can be grabbed in-experience (common to all types) |
+
+### Special Notes:
+The Creator handles image uploads and assigns the storage path to `url`.
+The `url` value is a Supabase storage path, **not** a full URL — the runtime calls `CreateSignedUrl` to fetch the actual image.
+
+### Example:
+
+```json
+{
+  "position": { "x": 5, "y": 1, "z": -6 },
+  "rotation": { "x": 0.0, "y": 0.0, "z": 0.0 },
+  "scale":    { "x": 1.0, "y": 1.0, "z": 1.0 },
+  "type": "pre-defined",
+  "resourcename": "Billboard",
+  "item-custom-args": [
+    { "argument": "url", "value": "b83a17ab-92bf-4122-a4d0-7b467a105ae0/Screenshot_Loading.png" }
+  ],
+  "item-custom-args-adv": null
+}
+```
diff --git a/objects/CCTVCamera.md b/objects/CCTVCamera.md
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+# CCTVCamera
+
+### Type
+pre-defined
+
+### 3D
+The CCTV Camera is a small, dark gray box.
+Origin is at the Center.
+Spawnpoint should be {0,3,0} and its target set so it already points slightly down.
+
+### Custom Args:
+| Key | Type | Implemented | Description |
+|---|---|---|---|
+| target | string `"x,y,z"` | ⚠️ (Unity only reads rotation) | World-space look-at point. Could be a moveable object in the future.|
+| fov | float (degrees) | ✔️ | Camera field of view in degrees. Derived in Creator as `zoom * 60`. |
+| grabable | `"true"` / `"false"` | ⚠️ (Unity missing) | Whether the item can be grabbed in-experience (common to all types) |
+
+### Special Notes:
+The `target` arg is documented in the database but the `CCTVCameraBehaviour` switch statement does not handle it — the camera's look direction is controlled by the object's `rotation` in the scene.
+In the Creator, `fov = zoom * 60` where zoom is 1–10.
+
+### Example:
+
+```json
+{
+  "position": { "x": 0.0, "y": 3.0, "z": 5.0 },
+  "rotation": { "x": 30.0, "y": 0.0, "z": 0.0 },
+  "scale":    { "x": 1.0, "y": 1.0, "z": 1.0 },
+  "type": "pre-defined",
+  "resourcename": "CCTVCamera",
+  "item-custom-args": [
+    { "argument": "target", "value": "0,0,6" },
+    { "argument": "fov",    "value": "140" }
+  ],
+  "item-custom-args-adv": null
+}
+```
diff --git a/objects/Cone.md b/objects/Cone.md
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+# Cone
+
+### Type
+pre-defined
+
+### 3D
+The Cone is 1m high with a 0.5m base radius (from Cone.glb mesh).
+Its Origin is at the Geometric Center.
+Cone is pointing upwards.
+Spawnpoint should be {0,0.5,0} so the base rests on the floor.
+
+### Custom Args:
+| Key | Type | Implemented | Description |
+|---|---|---|---|
+| color | hexColor | ✔️ | Color of the cone material |
+| grabable | `"true"` / `"false"` | ⚠️ (Unity missing) | Whether the item can be grabbed in-experience (common to all types) |
+
+### Special Notes:
+_none_
+
+### Example:
+
+```json
+{
+  "position": { "x": 4.0, "y": 0.5, "z": 0.0 },
+  "rotation": { "x": 0.0, "y": 0.0, "z": 0.0 },
+  "scale":    { "x": 1.0, "y": 1.0, "z": 1.0 },
+  "type": "pre-defined",
+  "resourcename": "Cone",
+  "item-custom-args": [
+    { "argument": "color", "value": "#ff9900" }
+  ],
+  "item-custom-args-adv": null
+}
+```
diff --git a/objects/DirectionalLight.md b/objects/DirectionalLight.md
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+++ b/objects/DirectionalLight.md
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+# Directional Light
+
+### Type
+pre-defined
+
+### 3D
+No visible mesh. Represents a scene-wide directional light source (like the sun).
+The `target` arg defines the direction the light points toward.
+Default spawn height is y=5.
+
+### Custom Args:
+| Key | Type | Implemented | Description |
+|---|---|---|---|
+| color | hexColor | ⚠️ (Creator tbd) | Color of the light |
+| intensity | float | ⚠️  **See note below.** | Light intensity (default tbd). |
+| target | string `"x,y,z"` | ⚠️ (Unity only reads rotation) | World-space look-at point the light aims at |
+| grabable | `"true"` / `"false"` | ⚠️ | Whether the item can be grabbed in-experience (common to all types) |
+
+### Special Notes:
+**Key name discrepancy:** The database save format uses `intensity` as the argument key, but `LightManupulationBehaviour.cs` reads `brightness`. Light intensity args may not apply at runtime unless this is resolved.
+
+### Example:
+
+```json
+{
+  "position": { "x": 0.0, "y": 5.0, "z": 0.0 },
+  "rotation": { "x": 0.0, "y": 0.0, "z": 0.0 },
+  "scale":    { "x": 1.0, "y": 1.0, "z": 1.0 },
+  "type": "pre-defined",
+  "resourcename": "Directional Light",
+  "item-custom-args": [
+    { "argument": "color",     "value": "#ffffff" },
+    { "argument": "intensity", "value": "20" },
+    { "argument": "target",    "value": "0,0,0" }
+  ],
+  "item-custom-args-adv": null
+}
+```
diff --git a/objects/Entrance.md b/objects/Entrance.md
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+++ b/objects/Entrance.md
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+# Entrance
+
+### Type
+pre-defined
+
+### 3D
+An (invisible) Object marking where the player spawns when entering the Room. In the creator is marked with a small disk.
+
+Default spawn is at y=0.1 to prevent players falling through the floor.
+
+### Custom Args:
+| Key | Type | Implemented | Description |
+|---|---|---|---|
+| grabable | `"true"` / `"false"` | ⚠️ | Whether the item can be grabbed in-experience (common to all types) |
+
+### Special Notes:
+_none_
+
+### Example:
+
+```json
+{
+  "position": { "x": 0.0, "y": 0.1, "z": 0.0 },
+  "rotation": { "x": 0.0, "y": 0.0, "z": 0.0 },
+  "scale":    { "x": 1.0, "y": 1.0, "z": 1.0 },
+  "type": "pre-defined",
+  "resourcename": "Entrance",
+  "item-custom-args": [],
+  "item-custom-args-adv": null
+}
+```
diff --git a/objects/Floor.md b/objects/Floor.md
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--- /dev/null
+++ b/objects/Floor.md
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+# Floor
+
+### Type
+pre-defined
+
+### 3D
+The Floor is a flat plane. Default dimensions are 10m × 10m.
+Its Origin is at the Center (surface level).
+Spawnpoint should be {0,0,0}.
+
+### Custom Args:
+| Key | Type | Implemented | Description |
+|---|---|---|---|
+| color | hexColor | ✔️ | Color of the floor material |
+| opacity | float (0–1) | ⚠️ (not in Unity) | Transparency of the floor material |
+| grabable | `"true"` / `"false"` | ⚠️ | Whether the item can be grabbed in-experience (common to all types) |
+
+### Special Notes:
+The Floor uses `Plane` as its `resourcename`. The Creator type is `Floor`.
+Has a collider and is a "Teleportation Area".
+
+### Example:
+
+```json
+{
+  "position": { "x": 0.0, "y": 0.0, "z": 0.0 },
+  "rotation": { "x": 0.0, "y": 0.0, "z": 0.0 },
+  "scale":    { "x": 10, "y": 1, "z": 5.0 },
+  "type": "pre-defined",
+  "resourcename": "Plane",
+  "item-custom-args": [
+    { "argument": "color", "value": "#cccccc" }
+  ],
+  "item-custom-args-adv": null
+}
+```