Hairy monster

Posted: 1247213523|%e %B %Y, %H:%M|agohover
Tags: fur gallery gelato

There is a new creature in the Gelato gallery that demonstrates XRT fur rendering capabilities. Frightening, isn't it ?


The rendering times are frightening too (more than 10 hours on my PC). Because the fur is made of tiny little curves, sampling has been set to 6x6 subsamples. Otherwise, aliasing starts to appear as tiny holes in the individual hairs. The other issue that explains long rendering times is the fact that, in a given volume, there are lots of primitives. The BVH acceleration structure that I am using is obviously having a hard time choosing a sufficiently small set of candidates for intersection testing. This is a problem that I have already noticed while benchmarking with other simpler scenes but for which I haven't yet found a solution (improved implementation or better algorithm ?).

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