PantaRay: fast ray-traced occlusion caching of massive scenes

  • Authors:
  • Jacopo Pantaleoni;Luca Fascione;Martin Hill;Timo Aila

  • Affiliations:
  • NVIDIA Research;Weta Digital;Weta Digital;NVIDIA Research

  • Venue:
  • ACM SIGGRAPH 2010 papers
  • Year:
  • 2010

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Abstract

We describe the architecture of a novel system for precomputing sparse directional occlusion caches. These caches are used for accelerating a fast cinematic lighting pipeline that works in the spherical harmonics domain. The system was used as a primary lighting technology in the movie Avatar, and is able to efficiently handle massive scenes of unprecedented complexity through the use of a flexible, stream-based geometry processing architecture, a novel out-of-core algorithm for creating efficient ray tracing acceleration structures, and a novel out-of-core GPU ray tracing algorithm for the computation of directional occlusion and spherical integrals at arbitrary points.