Progressive photon mapping solves the memory limitation problem of traditional photon mapping. It gives the
correct radiance with a large passes, but it converges slowly. We propose an anisotropic progressive photon mapping
method to generate high quality images with a few passes. During the rendering process, different from standard
progressive photon mapping, we store the photons on the surfaces. At the end of each pass, an anisotropic method is
employed to compute the radiance of each eye ray based on the stored photons. Before move to a new pass, the photons
in the scene are cleared. The experiments show that our method generates better results than the standard progressive
photon mapping in both numerical and visual qualities.
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