# Render Layers Demo

3D object visibility via render layer bitmasks.

```{raw} html
<a class="example-run-button" href="../demos/features_3d_render_layers.html">▶ Run in browser</a>

```

**Tags:** `3d`

Demonstrates:
  - Assigning objects to different render layers (0, 1, 2)
  - Camera cull_mask controls which layers are visible
  - Toggle layers with keyboard (1, 2, 3)

Run:
    uv run python examples/features/3d/render_layers.py
    uv run python examples/features/3d/render_layers.py --test

Controls:
    1       - Toggle layer 0 (red cubes)
    2       - Toggle layer 1 (green spheres)
    3       - Toggle layer 2 (blue cubes)
    A / D   - Orbit camera

## Source

```{literalinclude} ../../examples/features/3d/render_layers.py
:language: python
:linenos:
```