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Double- and Multiple-Scattering Effects in Translucent Materials
May-June 2013 (vol. 33 no. 3)
pp. 66-76
N. Holzschuch, INRIA Grenoble, Grenoble, France
J-D Gascuel, LJK, France
Some materials, such as coffee, milk, or marble, have a soft translucent aspect because of subsurface scattering. Light enters them and gets scattered several times before leaving in a different place. A full representation of subsurface-scattering effects in illumination simulation is computationally expensive. The main difficulty comes from multiple scattering events. The high number of events increases the results' uncertainty, requiring more computation time. However, a strong correlation exists between the surface effects of multiple scattering and the effects after just two scattering events. This knowledge can help accelerate multiple-scattering effects. In particular, researchers have exploited this knowledge to provide a model and implementation for fast computation of double-scattering events using a precomputed density function stored compactly.
Index Terms:
Materials,Scattering,Photonics,Computational modeling,Lighting,Approximation methods,Rendering (computer graphics),Three dimensional displays,Shadow mapping,computer graphics,3D graphics,realism,color,shading,shadowing,texture,scattering,translucent materials
Citation:
N. Holzschuch, J-D Gascuel, "Double- and Multiple-Scattering Effects in Translucent Materials," IEEE Computer Graphics and Applications, vol. 33, no. 3, pp. 66-76, May-June 2013, doi:10.1109/MCG.2013.19
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