Piecewise constant conic sections for accelerated volume density rendering

Roland B. Hougs, Andy M. Day

Research output: Contribution to conferencePaper


In order to accelerate the rendering of volumetric shadows, we propose a new technique which builds sets of conic volumes to approximate the shape of shadows in a participating medium. The novelty of our approach is notably the construction of the cone-sets, which are built with no knowledge of the underlying geometry of the scene. Instead, information collected during the construction of a global photon map is used to derive an estimate of the outline of the shadows in three dimensions. This information is then used in several different ways to speed up the rendering pass. The method shares many of the advantages proposed by photon maps such as viewpoint independence and decoupling from the geometry of the scene.
Original languageEnglish
Publication statusPublished - Sep 2001
EventEurographics 2001 - Manchester, United Kingdom
Duration: 5 Sep 20017 Sep 2001


ConferenceEurographics 2001
Country/TerritoryUnited Kingdom

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