The way I uv'd mine was, the sides were mirrored, and the front and back were mirrored. I only textured one of the sets of wheels. In all, I used a 4096 for the train itself, a 1024 for the bogies/wheels, and a 512 for the couplers (connectors).... But, actually, I compiled the couplers and bogies into a 2048 texture atlas…