Cycles: path guiding #92571
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Sebastian Herholz
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Reference: blender/blender#92571
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Required for Blender 3.4
shade_volume.hOther
Background
For more efficient rendering of difficult light setups, including caustics to some extent.
https://cgg.mff.cuni.cz/~jirka/path-guiding-in-production/2019/index.htm
Based on integrating Intel Open Path Guiding Library:
https://github.com/OpenPathGuidingLibrary/openpgl
Changed status from 'Needs Triage' to: 'Confirmed'
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A question, what do you think of this: https://graphics.cg.uni-saarland.de/publications/rath-2020-siggraph-guiding.html
I talked about this on the devtalk thread some time ago: https://devtalk.blender.org/t/cycles-x-feedback/18598/405
It is said that it only adds three line of code to the Müller paper and it improves the result so much.
I am not sure how true this "three lines of code" statement is, but if it's really that easy to add on top of Müller et al. maybe this is something that can be considered?
But if this is actually not the case then nevermind.
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Any updates on this, such as a rough timescale? The lack of caustics is one of the only things keeping Cycles from matching Corona and Luxcore for pure realism.
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There are no time estimates still, see recent comment from William:
https://code.blender.org/2021/11/cycles-x-project-update/#comment-126279
Ah I see, we'll just have to be patient!
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