Hello, very often when I load a mesh with uv map you have this problem. I seemed to understand what happens because during the Second Life upload divided into triangles and often someone forgets sometimes as texture, sometimes as a rig ... after several attempts a mesh of 10 is good, but it is not fun anymore since you pay for. Or I'm wrong something? Unfortunately, the model has already been done and I am having a lot of problems that I take away the desire to continue. Sorry for my English but I'm using a translator