Primary Sample Space Path Guiding

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jbikker
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Primary Sample Space Path Guiding

Postby jbikker » Tue Jul 10, 2018 8:28 am

Jerry Jinfeng Guo et al.'s paper on Primary Sample Space Path Guiding is now available from:
https://graphics.tudelft.nl/Publication ... 018/GBBE18

graphicsMan
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Re: Primary Sample Space Path Guiding

Postby graphicsMan » Mon Jul 16, 2018 8:28 pm

Nice, thanks for sharing!

ingenious
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Re: Primary Sample Space Path Guiding

Postby ingenious » Tue Jul 24, 2018 4:41 pm

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
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Re: Primary Sample Space Path Guiding

Postby friedlinguini » Wed Jul 25, 2018 3:24 am

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.


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