Packet-based Hierarchal Soft Shadow Mapping

Yang Baoguang 1, 2 Jieqing Feng 1 Gael Guennebaud 3, 4 Xinguo Liu 1
4 IPARLA - Visualization and manipulation of complex data on wireless mobile devices
Université Sciences et Technologies - Bordeaux 1, Inria Bordeaux - Sud-Ouest, École Nationale Supérieure d'Électronique, Informatique et Radiocommunications de Bordeaux (ENSEIRB), CNRS - Centre National de la Recherche Scientifique : UMR5800
Abstract : Recent soft shadow mapping techniques based on back-projection can render high quality soft shadows in real time. However, real time high quality rendering of large penumbrae is still challenging, especially when multi-layer shadow maps are used to reduce single light sample silhouette artifact. In this paper, we present an efficient algorithm to attack this problem. We first present a GPU-friendly packet-based approach rendering a packet of neighboring pixels together to amortize the cost of computing visibility factors. Then, we propose a hierarchical technique to quickly locate the contour edges, further reducing the computation cost. At last, we suggest a multi-view shadow map approach to reduce the single light sample artifact. We also demonstrate its higher image quality and higher efficiency compared to the existing depth peeling approaches.
Type de document :
Article dans une revue
Computer Graphics Forum, Wiley, 2009, Proceedings of Eurographics Symposium on Rendering 2009, 28 (4), pp.1121--1130
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Contributeur : Gaël Guennebaud <>
Soumis le : lundi 23 mai 2011 - 16:14:37
Dernière modification le : vendredi 11 septembre 2015 - 01:06:40
Document(s) archivé(s) le : mercredi 24 août 2011 - 02:20:33


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  • HAL Id : inria-00390541, version 1



Yang Baoguang, Jieqing Feng, Gael Guennebaud, Xinguo Liu. Packet-based Hierarchal Soft Shadow Mapping. Computer Graphics Forum, Wiley, 2009, Proceedings of Eurographics Symposium on Rendering 2009, 28 (4), pp.1121--1130. <inria-00390541>



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