The game was developed by Rockstar Toronto.
warbuilding.jpg

This is a model of a building.

Some building models are stored in the following format:
4ByteFloatingPointVertexes(X,Y,Z)+4ByteFloatingWeight
10ByteFaceListArray(2ByteVertexes(#1,#2,#3), UnknownBytes(#1,#2,#2,#4)

Character models use a different format.