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- W3136243606 abstract "Rendering complex scenes with indirect illumination, high dynamic range environment lighting, and many direct light sources remains a challenging problem. Prior work has shown that all these effects can be approximated by many point lights. This paper presents a scalable solution to the many-light problem suitable for a GPU implementation. We view the problem as a large matrix of sample-light interactions; the ideal final image is the sum of the matrix columns. We propose an algorithm for approximating this sum by sampling entire rows and columns of the matrix on the GPU using shadow mapping. The key observation is that the inherent structure of the transfer matrix can be revealed by sampling just a small number of rows and columns. Our prototype implementation can compute the light transfer within a few seconds for scenes with indirect and environment illumination, area lights, complex geometry and arbitrary shaders. We believe this approach can be very useful for rapid previewing in applications like cinematic and architectural lighting design." @default.
- W3136243606 created "2021-03-29" @default.
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- W3136243606 date "2007-07-29" @default.
- W3136243606 modified "2023-10-14" @default.
- W3136243606 title "Matrix row-column sampling for the many-light problem" @default.
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- W3136243606 doi "https://doi.org/10.1145/1276377.1276410" @default.
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