It is a bit hard to explain but here goes, A table asset has 2 uv sets, one will be using a tilable texture, and the 2nd will use a unique 0-1 layout for overlay for variation. Is there a way to use a tilable texture on 1st uv set and texture on the 2nd unique map on overlay mode?
Using a secondary UV channel isn't possible for the moment in Painter. This is a feature request that we've taken into account though. If you have any other questions, feel free to ask. Kind Regards, Geoffroy SC