# Shadow quality demo

cascade debug visualization and texel snapping.

```{raw} html
<a class="example-run-button" href="../demos/features_3d_shadows.html">▶ Run in browser</a>

```

**Tags:** `3d`

Demonstrates:
  - Cascaded shadow maps with texel snapping (prevents edge swimming)
  - Debug cascade colouring: red=near, green=mid, blue=far
  - Runtime cascade count (1, 2, or 3) via WorldEnvironment

Controls:
    D       - Toggle cascade debug colour overlay
    1 / 2 / 3 - Set active cascade count
    Escape  - Quit

Run: uv run python examples/features/3d/shadows.py

## Source

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