yes, the inside is the main part that needs to be textured, but there's alot of parts on the chassic that needs to be textured too (leaf spring, air bag, differential, air brakes, air brake arms, brake drums, wires, cables etc.) It's a really detail truck, but we manage to keep the polys below 5,000 for the tractor. Also, some parts need to be modified for high res textures.