Simulating Photon Mapping for Real-time Applications

Bent Dalgaard Larsen, Niels Jørgen Christensen

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    Abstract

    This paper introduces a novel method for simulating photon mapping for real-time applications. First we introduce a new method for selectively redistributing photons. Then we describe a method for selectively updating the indirect illumination. The indirect illumination is calculated using a new GPU accelerated final gathering method and the illumination is then stored in light maps. Caustic photons are traced on the CPU and then drawn using points in the framebuffer, and finally filtered using the GPU. Both diffuse and non-diffuse surfaces can be handled by calculating the direct illumination on the GPU and the photon tracing on the CPU. We achieve real-time frame rates for dynamic scenes.
    Original languageEnglish
    Title of host publicationEurographics Symposium on Rendering
    Publication date2004
    Publication statusPublished - 2004

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