Compositing in 3D Space with Action > About Lights and Lighting Effects >

# Relighting: Rays

Use rays to simulate volumetric effects. You can attach a Rays object to a light in Action.

You can position rays behind 2D or 3D objects to generate effects, although rays are still visible even without an object to outline them. When semi-transparent objects are positioned in front of the light, it is possible to generate volumetric rays that use the colour of the object.

#### Topics in this section

- Adding a Rays Object to a Light
- Rays Menu Settings