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Journal Articles Computer Graphics Forum Year : 2015

Accurate computation of single scattering in participating media with refractive boundaries

Abstract

Volume caustics are high-frequency effects appearing in participating media with low opacity, when refractive interfaces are focusing the light rays. Refractions make them hard to compute, since screen locality does not correlate with spatial locality in the medium. In this paper we give a new method for accurate computation of single scattering effects in a participating media enclosed by refractive interfaces. Our algorithm is based on the observation that although radiance along each camera ray is irregular, contributions from individual triangles are smooth. Our method gives more accurate results than existing methods, faster. It uses minimal information and requires no precomputation or additional data structures.
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Format : Figure, Image
Origin : Files produced by the author(s)
Format : Figure, Image
Origin : Files produced by the author(s)
Format : Figure, Image
Origin : Files produced by the author(s)
Format : Figure, Image
Origin : Files produced by the author(s)
Format : Figure, Image
Origin : Files produced by the author(s)
Format : Figure, Image
Origin : Files produced by the author(s)
Origin : Files produced by the author(s)
Origin : Files produced by the author(s)

Dates and versions

hal-01083246 , version 1 (16-11-2014)
hal-01083246 , version 2 (25-06-2015)

Licence

Attribution - NonCommercial - ShareAlike

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Cite

Nicolas Holzschuch. Accurate computation of single scattering in participating media with refractive boundaries. Computer Graphics Forum, 2015, 34 (6), pp.48-59. ⟨10.1111/cgf.12517⟩. ⟨hal-01083246v2⟩
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