What Scally said. The tail is probably seen because it was automatically set to png. Your images have to also match what you have in the material file as well. For example, if you had two sides of the body, a bodyL and bodyR, in the material file, you would have to add an L in one for the body and R in the other. If your images were ever jpg(which i'm not sure if jpg even works), they would have to say jpg in the MAT file. I hope your problem is fixed :)