BAOGUANG, Yang; FENG, Jieqing; GUENNEBAUD, Gael; LIU, Xinguo

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BAOGUANG, Yang
State Key Lab CAD&CG [HangZhou]
S3 Graphics Co., Ltd. [China] [S3 Graphics]

FENG, Jieqing
State Key Lab CAD&CG [HangZhou]

GUENNEBAUD, Gael
Laboratoire Bordelais de Recherche en Informatique [LaBRI]
Visualization and manipulation of complex data on wireless mobile devices [IPARLA ]

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Computer Graphics Forum. 2009, vol. 28, n° 4, p. 1121--1130

Wiley

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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.< Réduire

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Packet-based Hierarchal Soft Shadow Mapping

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Résumé en anglais

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