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To simplify it further, we'll demonstrate it with a red sphere inside a glass sphere.
Maya and RIB file
Download a Maya file or inspect a RIB file for this example:
Light Linking with PxrAovLight
Use light linking to include/exclude pieces of geometry in the AOV. In this example, the PxrAovLight is "off" globally and "on" for the eye in the scene. This linking setup creates a mask of the red sphere inside the refractive glass.
Defining the Output AOV
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| PxrAovLight | MyAOVName |
| Channel Source | MyAOVName |
Light Filters and PxrAovLight
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