Blender Discussions

[morgan_nilsson]

Whilst the Material Index writes out something, neither Object or Material Index can be specified with the ID Mask node in the compositor. 

Object Index always renders out as black.

Best regards
//Morgan

[morgan_nilsson]

Well, this post totally got misplaced... Meant for the ProRender - Blender subpage but that is greyed out for posting so, let this serve as a notice for that as well. 

[bsavery]

Thanks.  I'll take a look.  We have a release coming out with Blender 2.82.  Perhaps we could squeeze something in for this.