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A Deferred Shading Algorithm for Real-Time Indirect Illumination

Cyril Soler 1, 2 Olivier Hoel 1, 2 Frank Rochet 1
2 ARTIS - Acquisition, representation and transformations for image synthesis
Inria Grenoble - Rhône-Alpes, LJK - Laboratoire Jean Kuntzmann, Grenoble INP - Institut polytechnique de Grenoble - Grenoble Institute of Technology
Abstract : We present a deferred shading algorithm for computing screen-space multi-bounce indirect illumination with visibility, in real time. For each frame, we compute mipmapped G-Buffers of depth, normals, illumination and voxelized geometry. To each mipmap level we apply a single shader that gathers screen-space illumination using local Monte-Carlo integration. We upsample the illumination for all levels and smoothly combine them together. Our calculation is approximate but does not show artifacts, because it relies on noise-free Monte-Carlo integration of incoming illumination and temporal filtering. Our method simulates arbitrary distant illumination including visibility at a very low cost, because we only perform local texture lookups during computation. Besides, its deferred shading nature makes it independent of geometric and lighting complexity.
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https://hal.inria.fr/inria-00480869
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Submitted on : Tuesday, July 20, 2010 - 5:41:27 PM
Last modification on : Monday, November 8, 2021 - 9:48:06 AM
Long-term archiving on: : Friday, October 22, 2010 - 4:10:00 PM

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Cyril Soler, Olivier Hoel, Frank Rochet. A Deferred Shading Algorithm for Real-Time Indirect Illumination. ACM SIGGRAPH 2010 Talks, Aug 2010, Los Angeles, California, United States. pp.18, ⟨10.1145/1837026.1837049⟩. ⟨inria-00480869v2⟩

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