Irradiance Gradients in the Presence of Participating Media and Occlusions

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dc.contributor.authorJarosz, Wojciechen_US
dc.contributor.authorZwicker, Matthiasen_US
dc.contributor.authorJensen, Henrik Wannen_US
dc.date.accessioned2015-02-21T17:05:40Z
dc.date.available2015-02-21T17:05:40Z
dc.date.issued2008en_US
dc.description.abstractIn this paper we present a technique for computing translational gradients of indirect surface reflectance in scenes containing participating media and significant occlusions. These gradients describe how the incident radiance field changes with respect to translation on surfaces. Previous techniques for computing gradients ignore the effects of volume scattering and attenuation and assume that radiance is constant along rays connecting surfaces. We present a novel gradient formulation that correctly captures the influence of participating media. Our formulation accurately accounts for changes of occlusion, including the effect of surfaces occluding scattering media. We show how the proposed gradients can be used within an irradiance caching framework to more accurately handle scenes with participating media, providing significant improvements in interpolation quality.en_US
dc.description.number4en_US
dc.description.seriesinformationComputer Graphics Forumen_US
dc.description.volume27en_US
dc.identifier.doi10.1111/j.1467-8659.2008.01246.xen_US
dc.identifier.issn1467-8659en_US
dc.identifier.pages1087-1096en_US
dc.identifier.urihttps://doi.org/10.1111/j.1467-8659.2008.01246.xen_US
dc.publisherThe Eurographics Association and Blackwell Publishing Ltden_US
dc.titleIrradiance Gradients in the Presence of Participating Media and Occlusionsen_US
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EGSR08: 19th Eurographics Symposium on Rendering