Bitmask Soft Shadows

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dc.contributor.authorSchwarz, Michaelen_US
dc.contributor.authorStamminger, Marcen_US
dc.date.accessioned2015-02-21T15:43:07Z
dc.date.available2015-02-21T15:43:07Z
dc.date.issued2007en_US
dc.description.abstractRecently, several real-time soft shadow algorithms have been introduced which all compute a single shadow map and use its texels to obtain a discrete scene representation. The resulting micropatches are backprojected onto the light source and the light areas occluded by them get accumulated to estimate overall light occlusion. This approach ignores patch overlaps, however, which can lead to objectionable artifacts. In this paper, we propose to determine the visibility of the light source with a bit field where each bit tracks the visibility of a sample point on the light source. This approach not only avoids overlapping-related artifacts but offers a solution to the important occluder fusion problem. Hence, it also becomes possible to correctly incorporate information from multiple depth maps. In addition, a new interpretation of the shadow map data is suggested which often provides superior visual results. Finally, we show how the search area for potential occluders can be reduced substantially.en_US
dc.description.number3en_US
dc.description.seriesinformationComputer Graphics Forumen_US
dc.description.volume26en_US
dc.identifier.doi10.1111/j.1467-8659.2007.01074.xen_US
dc.identifier.issn1467-8659en_US
dc.identifier.pages515-524en_US
dc.identifier.urihttps://doi.org/10.1111/j.1467-8659.2007.01074.xen_US
dc.publisherThe Eurographics Association and Blackwell Publishing Ltden_US
dc.titleBitmask Soft Shadowsen_US
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