About screen clamping in irradiance cache. #36

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Apumx opened this Issue Aug 20, 2014 · 0 comments

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Apumx commented Aug 20, 2014

Since the pixel spacing is computed from dpdx and dpdy of differential geometry, if the camera ray hits many mirror before reaching a diffuse surface, the spacing may become very large. Because the minimum contribution range is
" minSamplePixelSpacing * pixelSpacing "
the cache point will cover a very large area. And if it's position is close to the camera, the artifact appears.

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