
Bizarre Creations has been forced to change Project Gotham Racing 4's lighting options due to the size limitations of a DVD. Here's how Bizarre's Ben explained it in this thread on the official forum:
It sounds like, given the options available to them, Bizarre made the right choice, but it's still a bit of a drag. Not drag enough to make it worthwhile for them to drop something else (like, say, the motorcycles or weather conditions) to free up the space for the added textures, but a drag just the same. PS3 fans, now would be an appropriate time to start extolling the virtues of Blu-ray.
About the time of the track [Bizarre Creations Forums]