Talking about precalculated lighting reminded me of this awesome paper I just read from Pixar Point Based Color Bleeding. They got a 10x speed up on GI over raytracing. I did a bunch of research on this topic and it's funny I was just one small insight away from what they are doing. Not doing it this way required me to have to go down a completely different path. Sometimes it's small things that change success to failure.
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