Hi, I am quite new to Substance Painter, I'm using it currently for a college project. I modelled a wall in C4D, and I colour coded the different parts that I wanted to be textured differently, however whenever I import the .obj from Cinema4D and apply a metallic texture to one of the assets, the asset turns solid black. I have removed the metallic attribute from the texture and it fixes, however I need that attribute. Anyone know of a fix?