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Atmospheric Scattering progress

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Hiya, I have been working on a planet generator, and just implemented atmospheric scattering. It is fairly naive, and has some hiccups. I've been trying to convert it to use lookup tables for the exp() and various other things, but that's trickier than I thought. According to profiling, the biggest sinner is the ray/sphere intersection code anyway, I just want to clean up the code to eventually make it into shaders. Anyway, here's some pics: If anybody has any comments, or suggested improvements, I'm all ear :)

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