# IBL

Image-based lighting on metallic spheres.

```{raw} html
<a class="example-run-button" href="../demos/features_3d_ibl.html">▶ Run in browser</a>

```

**Tags:** `3d`

Demonstrates:
  - Procedural skybox cubemap providing ambient IBL
  - IBL pass generating irradiance, prefiltered specular, and BRDF LUT
  - Row of spheres with varying roughness (0.05 to 0.95)
  - Row of spheres with varying metallic (0.0 to 1.0)
  - Directional light for direct illumination

Controls:
    Escape  - Quit

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

## Source

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