>> Also they use a global illumination system.
>
> No, they don't.
>
> According to Wikipedia, they use "occlusion mapping", which is a 
> comparatively cheap way to fake global illumination.

Well yes of course it is faked (like almost every other GPU effect), I 
wasn't expecting them to have invented a way to do physically correct 
per-pixel global illumination in real-time!  I just meant they were at least 
attempting to have some GI effect, not simply ignoring it as most games do.

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