GI "hot spot" artifacts
I'm trying to do a very large render and I'm getting a problem I guess I saw a long time ago, small spots (not visible on smaller renders) apparently caused by caustics in the GI combined with a GI environment, something to that effect. I've got a deadline and it's killing me.
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Permalink Reply by jim.carruthers on -
Oh, disabling caustics in the luma server works, but I've got part of the render that needs it.
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Permalink Reply by jim.carruthers on
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It was a problem from this old thread: http://legacy.brazil.mcneel.com/forums/t/634.aspx
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Permalink Reply by jim.carruthers on
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In the end I had to just render separately with caustics on and off and combine them. Looking at the advice from that old thread, trying to 'clamp' the HDR in Rhino just turned the white spots blue. Cranking up the sampling settings for the dome light was better but didn't remove them totally, they were just smoother. It's irritating that I didn't see the artifacts at all doing small test renders, only in the final 2700 or 8900px-wide output.
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