Interactive Screen-Space Accurate Photon Tracing on GPUs

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dc.contributor.authorKrüger, Jensen_US
dc.contributor.authorBürger, Kaien_US
dc.contributor.authorWestermann, Rüdigeren_US
dc.contributor.editorTomas Akenine-Moeller and Wolfgang Heidrichen_US
dc.date.accessioned2014-01-27T14:55:54Z
dc.date.available2014-01-27T14:55:54Z
dc.date.issued2006en_US
dc.description.abstractRecent advances in algorithms and graphics hardware have opened the possibility to render caustics at interactive rates on commodity PCs. This paper extends on this work in that it presents a new method to directly render caustics on complex objects, to compute one or several refractions at such objects and to simulate caustics shadowing. At the core of our method is the idea to avoid the construction of photon maps by tracing photons in screen-space on programmable graphics hardware. Our algorithm is based on the rasterization of photon paths into texture maps. Intersection events are then resolved on a per-fragment basis using layered depth images. To correctly spread photon energy in screen-space we render aligned point sprites at the diffuse receivers where photons terminate. As our method does neither require any pre-processing nor an intermediate radiance representation it can efficiently deal with dynamic scenery and scenery that is modified, or even created on the GPU.en_US
dc.description.seriesinformationSymposium on Renderingen_US
dc.identifier.isbn3-905673-35-5en_US
dc.identifier.issn1727-3463en_US
dc.identifier.urihttps://doi.org/10.2312/EGWR/EGSR06/319-329en_US
dc.publisherThe Eurographics Associationen_US
dc.subjectCategories and Subject Descriptors (according to ACM CCS): I.3.7 [Computing Methodologies]: COMPUTER GRAPHICSThree-Dimensional Graphics and Realism; I.3.3 [Computing Methodologies]: COMPUTER GRAPHICSPicture/ Image Generationen_US
dc.titleInteractive Screen-Space Accurate Photon Tracing on GPUsen_US
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EGSR06: 17th Eurographics Symposium on Rendering