The basic shape for the bus is in place, now its a matter of filling in the holes and destroying the thing. Ive got some nice reference images to work to so it shouldn't be too difficult. Ill do so by using the split polygon tool to break away and bend pieces of the bus, then use the broken pieces as rubble around the bus on the floor. Also i need to model in a basic chassis and some head-lamps to finish off the model. Following on from a previous post on modelling destruction, Digital Tutors have a great tutorial HERE on Modeling Architectural Destruction in Maya, which is well worth a watch for anyone interesting in environment work.