I’m having an issue: when I try to set it to all my character’s materials, the whole character gets the checkerboard material.
But if I set it to just a few materials it works. I was able to pin down two materials that if I try to set to the emissive material will get a checkerboard material instead. All other materials work, but those two get the checkerboard. And what is weird is that if I try to set one of those two materials at the same time as the other materials, all of them will get the checkerboard.
So those two materials not only do not get set to the right material, but they prevent the others from getting set to the right material.