I have an object that has been created by joining two objects. The entire thing has been uv mapped. When I go to "texture paint" the entire model is pink, which I expect. I click "Add Texture Paint Slot" and add a blank texture, which renders a large part of the model black (and paintable). However, all of the faces of the second object (and by "second" here, I am referring to the order of the objects when they were joined) are pink. I can paint directly on the part of the texture that is black, but I can't paint on the pink part.
Any guidance or suggestions would be appreciated!