# IBL

<a href="/demos/3d_ibl.html">Play Demo</a>

IBL (Image-Based Lighting) demo — metallic spheres with environment lighting.

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 packages/graphics/examples/3d_ibl.py

## Source Code

```{literalinclude} ../../packages/graphics/examples/3d_ibl.py
:language: python
:linenos:
```