---
title: "Lights"
url: "https://help.maxon.net/c4d/en-us/Content/html/XXMBSUBSURFACE-XMBSUBSURFACESHADER_GROUP_LIGHTS.html"
section_path: "Advanced Render > Subsurface Scattering Shader > Lights"
element_id: "XXMBSUBSURFACE"
group_id: "XMBSUBSURFACESHADER_GROUP_LIGHTS"
description: "Here you can define if light hitting an SSS object should be included in the calculation when GI is enabled. If this option is disabled, SSS will only …"
---

## Lights

### Compute GI Contribution

Parameter ID: `XMBSUBSURFACESHADER_LIGHTS_GI`

Here you can define if light hitting an SSS object should be included in the calculation when GI is enabled. If this option is disabled, SSS will only react to actual light sources.

### Use Lights

Parameter ID: `XMBSUBSURFACESHADER_LIGHTS_MODE`

### Lights

Parameter ID: `XMBSUBSURFACESHADER_LIGHTS`

Here you can define exactly which light sources in your Project should be included for a given SSS material.

Light sources can be dragged from the **Attribute Manager** and dropped into the **Lights** field.