I've been reading these papers and they're fascinating. Significantly faster HDR renderings with barely any noise (you can compare their images versus a typical noisy monte carlo solution.) I'm not sure what it takes to be implemented in Vray but thought it could be posted here:
http://gl.ict.usc.edu/research/MedianCut/
http://gl.ict.usc.edu/research/MedianCut/
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