I have a tooth model. I want it to be white outside and (any) voronoi texture inside. Is it possible?
How to ger rid of those red things? They're caused by boolean modifier
So, as your question is equivocal, you have 2 possible situations: Either you're talking about an object that is open and you need to give 2 different materials to each side of the same face OR you're talking about the intersection of an object with its boolean object.
Geometry node in shader editor solved my problem (Texturing inside of model black)