Let's not forget the insane 3D department. Every single building in there is fully modeled.
There are very few shortcuts there. The crowd work was sensational.
You are very lucky as a compositor when your handed material like this to work with. It never happened before that, or since.
There is a 15 minute breakdown on
www.uncharted-territory.com that is simply mind blowing.
worth a look.
Entire VFX budget, for hundreds of full cg shots was 3 million!
It's a testimony to artist before software and budget.