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Translucent Radiosity: Efficiently Combining Diffuse Inter-reflection and Subsurface Scattering
PrePrint
ISSN: 1077-2626
Yu Sheng, Carnegie Mellon University, Pittsburgh and Bosch Research and Technology Center North America
Yulong Shi, Beihang University, Beijing
Lili Wang, Beihang University, Beijing
Srinivasa G. Narasimhan, Carnegie Mellon University, Pittsburgh
It is hard to efficiently model the light transport in scenes with translucent objects for interactive applications. The interreflection between objects and their environments and the subsurface scattering through the materials intertwine to produce visual effects like color bleeding, light glows, and soft shading. Monte-Carlo based approaches have demonstrated impressive results but are computationally expensive, and faster approaches model either only inter-reflection or only subsurface scattering. In this paper, we present a simple analytic model that combines diffuse inter-reflection and isotropic subsurface scattering. Our approach extends the classical work in radiosity by including a subsurface scattering matrix that operates in conjunction with the traditional form factor matrix. This subsurface scattering matrix can be constructed using analytic, measurement-based or simulation-based models and can capture both homogeneous and heterogeneous translucencies. Using a fast iterative solution to radiosity, we demonstrate scene relighting and dynamically varying object translucencies at near interactive rates.
Index Terms:
Scattering,Materials,Lighting,Computational modeling,Mathematical model,Equations,Analytical models,and texture,Radiosity,Color,shading,shadowing
Citation:
Yu Sheng, Yulong Shi, Lili Wang, Srinivasa G. Narasimhan, "Translucent Radiosity: Efficiently Combining Diffuse Inter-reflection and Subsurface Scattering," IEEE Transactions on Visualization and Computer Graphics, 21 Nov. 2013. IEEE computer Society Digital Library. IEEE Computer Society, <http://doi.ieeecomputersociety.org/10.1109/TVCG.2013.256>
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