I am a bit surprised by this statement though; it some ways this demo looked like a typical realtime GI demo where in the demo they are constantly trying to mix different colours and have the surfaces pick them up. I saw a lot of the same thing in this demo, the switch mixing with the lighting, mixing with the ambient blue. Then the constant switching between red/blue/green/and spotlight type lighting. The surfaces all seemed to mix and pick those elements up.Frankly the lighting is relatively simple