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Shadow Matte - Arnold for Houdini

Further Reading
See Shadow Matte in the Arnold User Guide

The shadow_matte is a specific shader, used typically on floor planes to 'catch' shadows from lighting within the scene. It is useful for integrating a rendered object onto a photographic background.

Indirect parameters

AOV Group

Per light group shadow mattes. More information about light groups can be found here.

AOVs

A list of available AOVs available for the Shadow Matte shader. Each option creates a separate AOV render pass for that component. 

Note:

Note that the AOV must also be enabled in the Render Output.

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