Double- and Multiple-scattering Effects in Translucent Materials

Nicolas Holzschuch 1, * Jean-Dominique Gascuel 1, *
* Corresponding author
1 MAVERICK - Models and Algorithms for Visualization and Rendering
Inria Grenoble - Rhône-Alpes, LJK - Laboratoire Jean Kuntzmann, INPG - Institut National Polytechnique de Grenoble
Abstract : Some materials, such as coffee, milk or marble, have a soft translucent aspect because of sub-surface scattering: light enters them, is scattered several times inside before leaving in a different place. A full representation of sub-surface scattering effects in illumination simulation is computationally expensive. The main difficult comes from multiple scattering events: the high number of events increases the uncertainty on the result, forcing us to allocate more time for the computations. In this paper, we show that there is a strong correlation between the surface effects of multiple scattering inside the material and the effects after just two scatter events. This knowledge will help in accelerating multiple scattering effects. We exploit this knowledge to provide a model and implementation for fast computation of double-scattering events, using a precomputed density function stored in a compact way.
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Submitted on : Tuesday, February 12, 2013 - 6:23:43 PM
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Nicolas Holzschuch, Jean-Dominique Gascuel. Double- and Multiple-scattering Effects in Translucent Materials. IEEE Computer Graphics and Applications, Institute of Electrical and Electronics Engineers, 2013, Special Issue on Scattering: Acquisition, Modeling and rendering, 33 (3), pp.66-76. ⟨10.1109/MCG.2013.19⟩. ⟨hal-00760054⟩

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