* Suspicious usage of pointer: short *type = 0; // this creates a null pointer When this is later used for anything then blender would crash. After following the code and check what happens i strongly believe the author wanted to use a short and not a pointer to a short here. * local variable where reused later in same function While this did no harm, i still felt it was better to use a different name here to make things more separated: - moved variable declaraiotns into loop (for int a=0; ...) - renamed uv_images to uv_image_set - renamed index variable from i to j in inner loop that reused same index name from outer loop