An efficient caching-based rendering of translucent materials

Authors:
Shih-Ling Keng;Wang-Yeh Lee;Jung-Hong Chuang
Affiliations:
National Chiao Tung University, Department of Computer Science, Hsinchu, Taiwan, R.O.C.;National Chiao Tung University, Department of Computer Science, Hsinchu, Taiwan, R.O.C.;National Chiao Tung University, Department of Computer Science, Hsinchu, Taiwan, R.O.C.
Venue:
The Visual Computer: International Journal of Computer Graphics
Year:
2006

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Abstract

This paper presents an efficient caching-based rendering technique for translucent materials. The proposed caching scheme, inspired by the irradiance caching method, is integrated into a hierarchical rendering technique for translucent materials. We propose a split-disk model to determine the cache distribution and derive the subsurface illuminance gradient used for interpolation by reformulating the equation of dipole diffusion approximation as a 3D convolution process. Our experiments show that only a few caches are required to interpolate the entire image, while the visual difference is negligible. The speedup could be achieved up to one order of magnitude.