Primary Sample Space Path Guiding back

(L) [2018/07/10] [ost by jbikker] [Primary Sample Space Path Guiding] Wayback!

Jerry Jinfeng Guo et al.'s paper on Primary Sample Space Path Guiding is now available from:
[LINK https://graphics.tudelft.nl/Publications-new/2018/GBBE18]

(L) [2018/07/16] [ost by graphicsMan] [Primary Sample Space Path Guiding] Wayback!

Nice, thanks for sharing!

(L) [2018/07/24] [ost by ingenious] [Primary Sample Space Path Guiding] Wayback!

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.

(L) [2018/07/25] [ost by friedlinguini] [Primary Sample Space Path Guiding] Wayback!

It seemed to have a lot of the same ideas as multidimensional adaptive sampling ([LINK https://www.ci.i.u-tokyo.ac.jp/~hachisuka/mdas.pdf]), and also the same weaknesses.