Prefiltered Cross-Section Occluders

dc.contributor.author	Condon, Timothy
dc.contributor.author	Walter, Bruce
dc.contributor.author	Bala, Kavita
dc.contributor.author	Greenberg, Donald
dc.date.accessioned	2010-07-25T17:40:20Z
dc.date.available	2010-07-25T17:40:20Z
dc.date.issued	2010-09
dc.description.abstract	We introduce an impostor-based visibility technique to provide approximate, average visibility for point-to-cluster and cluster-to-cluster visibility queries. Processing each object in a view-independent manner allows us to generate a mip-map-like hierarchy of approximate visibility information that can report approximate average visibility over conical shafts or conical shaft frustums. We demonstrate how these impostors can be used to approximate smooth soft shadow calculation, and improve the quality of lightcuts and multidimensional lightcuts. In addition, we describe how to use approximate visibility of shafts to estimate a tighter error bound for the lightcuts visibility term, yielding speedup by reducing over-aggressive cut refinement.	en_US
dc.description.sponsorship	Autodesk, Inc.; NSF CPA-G&V 0811680	en_US
dc.identifier.citation	Proceedings of the 2010 18th Pacific Conference on Computer Graphics and Applications	en_US
dc.identifier.uri	https://hdl.handle.net/1813/15844
dc.language.iso	en_US	en_US
dc.publisher	IEEE Computer Society	en_US
dc.subject	approximate occlusion	en_US
dc.subject	visibility	en_US
dc.subject	shadowing	en_US
dc.subject	impostors	en_US
dc.title	Prefiltered Cross-Section Occluders	en_US
dc.type	article	en_US

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