One of the coolest techniques we used on creating the characters for the Toy Story 3 game is that we relied heavily on normal maps. Most of the detail you see in this Hamm Mother Ship is basically normal maps. For those who don't understand how a normal map works...he's my take.
Although the Ship has indentations, ridges, etc...its really mostly a smooth mesh. The ridges and indentations are in the map. Cool huh?