Is it possible to select some faces then unwrap them and map them with image, then select some other faces then unwrap and map them, and so on? I have one quite complex model, which if I unwrap them at once, it seems some faces are missing from the unwrapped model, which I don't know why.
This should be done with face assignment too beside uv mapping. So select some faces, assign the material to the faces. then put seams and unwrap, then map with image. After this is done, select some other faces, assign new material to the faces, put seams and unwrap, and map with other image, and so on. Can't be done with just one material.