New Photon Biasing Schemes for the “Once-More-Collided-Flux-Estimator” Method

Authier, Nicolas; Both, J. P.; Nimal, J.C.

doi:10.13182/nse01-a2181

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Cited by 6 publications

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“…Our technique is similar in spirit, but they sampled a fixed outgoing direction first and only considered a non‐analog PDF for the distance to the once‐more collided vertex. Later works seem to indicate that this approach does not work well for anisotropic scattering [ABN01]. Kalli and Cashwell [KC77] combine Kalos' once‐more collided flux estimator with a directional resampling technique, which, as we do, changes the outgoing direction at a scattering vertex to a non‐analog random walk [SK71].…”

Section: Background and Previous Workmentioning

confidence: 99%

Once‐more scattered next event estimation for volume rendering

Hanika

Weidlich²,

Droske³

2022

Computer Graphics Forum

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Two cases where highly forward scattering phase functions deliver a distinct look. Left: atmospheric haze, right: ocean water. The slices compare our specialised sampling technique to equiangular sampling and a reference image. The characteristic glow around the objects submerged in the medium disappears in noise for equiangular sampling, since it is caused by the phase function that is not importance sampled in this case. The images other than the reference are equal sample count and approximately equal time.

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Section: Background and Previous Workmentioning

confidence: 99%