Shadow Caster Culling for Efficient Shadow Mapping

Information

• Publication Type: Conference Paper
• Workgroup(s)/Project(s):
  • General Purpose Visibility
• Date: February 2011
• ISBN: 978-1-4503-0565-5
• Publisher: ACM
• Organization: ACM SIGGRAPH
• Location: San Francisco
• Lecturer: Jirí Bittner
• Booktitle: Proceedings of the ACM SIGGRAPH Symposium on Interactive 3D Graphics and Games 2011
• Conference date: 18. February 2011 – 20. February 2011
• Pages: 81 – 88
• Keywords: occlusion culling, shadow mapping

Abstract

We propose a novel method for efficient construction of shadow maps by culling shadow casters which do not contribute to visible shadows. The method uses a mask of potential shadow receivers to cull shadow casters using a hierarchical occlusion culling algorithm. We propose several variants of the receiver mask implementations with different culling efficiency and computational costs. For scenes with statically focused shadow maps we designed an efficient strategy to incrementally update the shadow map, which comes close to the rendering performance for unshadowed scenes. We show that our method achieves 3x-10x speedup for rendering large city like scenes and 1.5x-2x speedup for rendering an actual game scene.

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BibTeX

@inproceedings{bittner-2011-scc,
  title =      "Shadow Caster Culling for Efficient Shadow Mapping",
  author =     "Jir\'{i} Bittner and Oliver Mattausch and Ari Silvennoinen
               and Michael Wimmer",
  year =       "2011",
  abstract =   "We propose a novel method for efficient construction of
               shadow maps by culling shadow casters which do not
               contribute to visible shadows. The method uses a mask of
               potential shadow receivers to cull shadow casters using a
               hierarchical occlusion culling algorithm. We propose several
               variants of the receiver mask implementations with different
               culling efficiency and computational costs. For scenes with
               statically focused shadow maps we designed an efficient
               strategy to incrementally update the shadow map, which comes
               close to the rendering performance for unshadowed scenes. We
               show that our method achieves 3x-10x speedup for rendering
               large city like scenes and 1.5x-2x speedup for rendering an
               actual game scene.",
  month =      feb,
  isbn =       "978-1-4503-0565-5",
  publisher =  "ACM",
  organization = "ACM SIGGRAPH",
  location =   "San Francisco",
  booktitle =  "Proceedings of the ACM SIGGRAPH Symposium on Interactive 3D
               Graphics and Games 2011",
  pages =      "81--88",
  keywords =   "occlusion culling, shadow mapping",
  URL =        "https://www.cg.tuwien.ac.at/research/publications/2011/bittner-2011-scc/",
}