Such a boring request :) I really thought it was possible and was quite baffeled when it resulted in a warning. The other renderer can do it I believe. And it would be super practical to be able to put dirt and other stuff on top of a more complex materials. I have a terrain or some streets with sidewalks and parks, that all are defined by one big multi/sub material. Would be nice to be able to put a dirtmap on top of all of it, instead of nesting a unique material manually between each sub-material and the multi material. Can't you like programatically tell the renderer to do basically that when there's a layered on on top? Is this difficult or is there a risk of a slowdown or loops?
