Technical Section: Efficient reuse of paths for random walk radiosity
Computers and Graphics
SRDH: specializing BVH construction and traversal order using representative shadow ray sets
EGGH-HPG'12 Proceedings of the Fourth ACM SIGGRAPH / Eurographics conference on High-Performance Graphics
Parallelization and hardware support for ray tracing
EGGH'92 Proceedings of the Seventh Eurographics conference on Graphics Hardware
Probabilistic visibility evaluation for direct illumination
EGSR '13 Proceedings of the Eurographics Symposium on Rendering
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In one area of computer graphics, realistic image synthesis, the ultimate goal is to produce a picture indistinguishable from a photograph of a real environment. A particularly powerful technique for simulating light reflection-an important element in creating this realism-is called ray tracing. This method produces images of excellent quality, but suffers from lengthy computation time that limits its practical use. This article presents a new method to reduce shadow testing time during ray tracing. The technique involves generating light buffers, each of which partition the environment with respect to an individual light source. These partition descriptions are then used during shadow testing to quickly determine a small subset of objects that may have to be tested for intersection. The results of timing tests illustrate the beneficial performance of these techniques. The tests compare the standard ray-tracing algorithm to light buffers of varying resolution.