Is it possible to get the "roughness" value in RenderLayer like diffuse and specular values

by thigi   Last Updated September 11, 2019 14:15 PM - source

I am using the diffuse and specular color for RenderLayers. However, I would also like to additionally get the "roughness". Is that somehow possible in blender? I know I could get the roughness per material ID but what if the roughness is a "roughness" map?

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