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Rendering realistic soft shadow under all-frequency lighting environment is receiving more and more attention in recent years. 2D Haar wavelet has been recognized superior at approximation of all-frequency signals such as very keen-edged shadows. Nevertheless, rotating scene objects efficiently under wavelet basis has yet remained a troublesome problem. In this paper, we present a spherical reparameterization...
Visibility precomputation has become essential for PRT-based rendering involving soft shadows. While graphic hardware rasterization has been increasingly used to compute visibility information for a mass of precomputation tasks, the linear feature of rasterization makes it unadaptive to sample visibility in a coordinates system, to which the Cartesian coordinates are non-linearly mapped. With the...
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