RGB masks

[Egert_Kanep]

Any ideas how to render RGB mask for using in compositing? I tried material id, but the edge is not antialised and when exported I got weird values (maybe I used wrong settings to export).Also using material id pass outside blender is difficult. RGB mask would be nice addition, but right now I couldn't really come up with efficient method. If it could be used in a similar way like material id, it would be awesome.

[B.Y.O.B.]

LuxCore offers an anti-aliased material ID mask, it's on the todo list to be implemented in BlendLuxCore.
I can see if I find time to add it for v2.1.