Sorry if this is a newbie question. Self taught 3D artist here. I got my model into Marmoset from Blender and all is well, but the seams won't take textures. I can't sort it out. I'm sure this is a simple fix, but nothing I have tried lets me paint onto these areas after my bake. You can see in the screencap the grey outlines all over the model. The most obvious is the part at the top, there is a white outline around the two triangular parts in brass.