---
title: "AOV Light"
canonical: "https://rmanwiki-27.pixar.com/space/RFH27/544645211/AOV%20Light"
format: markdown
---
[PxrAOVLight](https://renderman.atlassian.net/wiki/spaces/REN26/pages/19661731) is a handy utility light that allows a lighting artist to output a shot-specific AOV mask without needing to request one from the shading artists or generate a [Light Path Expression](https://renderman.atlassian.net/wiki/spaces/REN26/pages/19662011) (LPE).

### Light Linking with PxrAovLight

Use [Light Linking](https://renderman.atlassian.net/wiki/spaces/RFH27/pages/544645013/Light+Linking) to include/exclude pieces of geometry in the AOV. In this example, the PxrAovLight is "off" globally and "on" the tree in the scene.  This linking set up creates creates a mask of the tree.

### Light Filters and PxrAovLight

Because PxrAovLight is a "light", we can add a light filters to modify the output AOV.  In this example, the [PxrIntMultLightFilter](https://renderman.atlassian.net/wiki/spaces/REN26/pages/19661767) is attached to PxrAovLight.  The Light Filter is only linked to the tree trunk, resulting in a gray value for the tree trunk mask.

![image](media://5052ff46-baf1-49db-ad0a-c9182c4bbda7)