Interactive Editing of Lighting and Materials using a Bivariate BRDF Representation

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dc.contributor.authorSitthi-Amorn, Pitchayaen_US
dc.contributor.authorRomeiro, Fabianoen_US
dc.contributor.authorZickler, Todden_US
dc.contributor.authorLawrence, Jasonen_US
dc.date.accessioned2015-02-23T16:58:31Z
dc.date.available2015-02-23T16:58:31Z
dc.date.issued2010en_US
dc.description.abstractWe present a new Precomputed Radiance Transfer (PRT) algorithm based on a two dimensional representation of isotropic BRDFs. Our approach involves precomputing matrices that allow quickly mapping environment lighting, which is represented in the global coordinate system, and the surface BRDFs, which are represented in a bivariate domain, to the local hemisphere at a surface location where the reflection integral is evaluated. When the lighting and BRDFs are represented in a wavelet basis, these rotation matrices are sparse and can be efficiently stored and combined with pre-computed visibility at run-time. Compared to prior techniques that also precompute wavelet rotation matrices, our method allows full control over the lighting and materials due to the way the BRDF is represented. Furthermore, this bivariate parameterization preserves sharp specular peaks and grazing effects that are attenuated in conventional parameterizations. We demonstrate a prototype rendering system that achieves real-time framerates while lighting and materials are edited.en_US
dc.description.number4en_US
dc.description.seriesinformationComputer Graphics Forumen_US
dc.description.volume29en_US
dc.identifier.doi10.1111/j.1467-8659.2010.01743.xen_US
dc.identifier.issn1467-8659en_US
dc.identifier.pages1461-1468en_US
dc.identifier.urihttps://doi.org/10.1111/j.1467-8659.2010.01743.xen_US
dc.publisherThe Eurographics Association and Blackwell Publishing Ltden_US
dc.titleInteractive Editing of Lighting and Materials using a Bivariate BRDF Representationen_US
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EGSR10: 21th Eurographics Symposium on Rendering