Speaking of engines . . . I'm having some difficulties with the light maps, (not sure they're assigned to the model) but I'm fairly happy with this anyway. The impulse exhaust is tiled so I decided to just go ahead with a pattern, to give the impression of mass by adding detail. I can't think of a way to line it up right but at game speed, (unless you're the captain), I don't think that will be all that noticeable.