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dc.contributor.authorHart, Daviden_US
dc.contributor.authorPharr, Matten_US
dc.contributor.authorMüller, Thomasen_US
dc.contributor.authorLopes, Warden_US
dc.contributor.authorMcGuire, Morganen_US
dc.contributor.authorShirley, Peteren_US
dc.contributor.editorDachsbacher, Carsten and Pharr, Matten_US
dc.description.abstractWe introduce a Monte Carlo importance sampling method for integrands composed of products and show its application to rendering where direct sampling of the product is often difficult. Our method is based on warp functions that operate on the primary samples in [0;1)^n, where each warp approximates sampling a single factor of the product distribution. Our key insight is that individual factors are often well-behaved and inexpensive to fit and sample in primary sample space, which leads to a practical, efficient sampling algorithm. Our sampling approach is unbiased, easy to implement, and compatible with multiple importance sampling. We show the results of applying our warps to projected solid angle sampling of spherical triangles, to sampling bilinear patch light sources, and to sampling glossy BSDFs and area light sources, with efficiency improvements of over 1.6 x on real-world scenes.en_US
dc.publisherThe Eurographics Association and John Wiley & Sons Ltd.en_US
dc.rightsAttribution 4.0 International License
dc.titlePractical Product Sampling by Fitting and Composing Warpsen_US
dc.description.seriesinformationComputer Graphics Forum

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  • 39-Issue 4
    Rendering 2020 - Symposium Proceedings

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Attribution 4.0 International License
Except where otherwise noted, this item's license is described as Attribution 4.0 International License