From your link, what an amazing interview. Wow, they really work very hard and long hours. Didn\'t know the whole polyphony staffs stay there overnight working on the game. it took them about 5 years to make the game. The same time it took them to make the first Gran Turismo. They spent from dawn to dusk and sleeping in the office to make each Gran Turismo games. Truly amazing, and very hard working these people are. Very dedicated.
It also talks about modeling the game and a room where people are hard at working doing physics to the game like car damages.
Very interesting read indeed.