Jerry Jinfeng Guo et al.'s paper on Primary Sample Space Path Guiding is now available from:
https://graphics.tudelft.nl/Publication ... 018/GBBE18
Primary Sample Space Path Guiding
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graphicsMan
- Posts: 167
- Joined: Mon Nov 28, 2011 7:28 pm
Re: Primary Sample Space Path Guiding
Nice, thanks for sharing!
Re: Primary Sample Space Path Guiding
I was initially excited by the title of the paper but I soon found a deal-breaker. With primary-/path-space path guiding, the dimensionality of the ideal cache is infinite. But the radiance field in the scene in world space is only a 4D or max 5D function (surface/volume + direction). Prior path guiding methods utilize a world-space 4D/5D cache and work really well. With path-space guiding, the curse of dimensionality kills everything.
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friedlinguini
- Posts: 89
- Joined: Thu Apr 11, 2013 5:15 pm
Re: Primary Sample Space Path Guiding
It seemed to have a lot of the same ideas as multidimensional adaptive sampling (https://www.ci.i.u-tokyo.ac.jp/~hachisuka/mdas.pdf), and also the same weaknesses.