# LutGrading

Desktop 3D-LUT colour grading via WorldEnvironment.

```{raw} html
<a class="example-run-button" href="../demos/features_3d_lut_grading.html">▶ Run in browser</a>

```

**Tags:** `3d` `post-process` `colour-grading` `lut` `tonemap`

Drives ``WorldEnvironment.lut_enabled`` / ``lut_tex_id`` on the desktop Vulkan
renderer, matching the web backend: a 3D ``rgba8`` LUT sampled post-tonemap on
the final LDR colour. A warm grade (id 1) and a cool/teal grade (id 2) are
registered at startup; pressing a key swaps the active LUT or disables grading
entirely. The identity (no-op) state is ``lut_enabled = False``.

Controls:
    A / D       - Orbit camera left / right
    W / S       - Pitch camera up / down
    1           - No LUT (neutral)
    2           - Warm grade
    3           - Cool / teal grade
    Escape      - Quit

## Source

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