A Practical Analytic Model for the Radiosity of Translucent Scenes
Yu Sheng, Yulong Shi, Lili Wang, Srinivasa G. Narasimhan
Proceedings of ACM SIGGRAPH Symposium on Interactive 3D Graphics and Games (2013)
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Light propagation in scenes with translucent objects is hard to model efficiently for interactive applications. The inter-reflections 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 interreflections or only subsurface scattering. In this paper, we present a simple analytic model that combines diffuse inter-reflections 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.

Yu Sheng, Yulong Shi, Lili Wang, Srinivasa G. Narasimhan (2013). A Practical Analytic Model for the Radiosity of Translucent Scenes. Proceedings of ACM SIGGRAPH Symposium on Interactive 3D Graphics and Games.

@article{Sheng2013APA,
author = {Yu Sheng and Yulong Shi and Lili Wang and Srinivasa G. Narasimhan},
title = {A Practical Analytic Model for the Radiosity of Translucent Scenes},
year = {2013},
month = {March},
booktitle = {Proceedings of ACM SIGGRAPH Symposium on Interactive 3D Graphics and Games},
links = {http://www.cs.cmu.edu/~ILIM/projects/LT/radiosity_model/},

}