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Green Image
Issue No. 04 - July/August (2010 vol. 30)
ISSN: 0272-1716
pp: 32-41
Jorge Jimenez , Universidad de Zaragoza
Veronica Sundstedt , Blekinge Institute of Technology
Diego Gutierrez , Universidad de Zaragoza
David Whelan , Trinity College Dublin
ABSTRACT
Diffusion theory allows the production of realistic skin renderings. The dipole and multipole models allow for solving challenging diffusion-theory equations efficiently. By using texture-space diffusion, a Gaussian-based approximation, and programmable graphics hardware, developers can create real-time, photorealistic skin renderings. Performing this diffusion in screen space offers advantages that make diffusion approximation practical in scenarios such as games, where having the best possible performance is crucial. However, unlike the texture-space counterpart, the screen-space approach can't simulate transmittance of light through thin geometry; it yields unrealistic results in those cases. A new transmittance algorithm turns the screen-space approach into an efficient global solution, capable of simulating both reflectance and transmittance of light through a multilayered skin model. The transmittance calculations are derived from physical equations, which are implemented through simple texture access. The method performs in real time, requiring no additional memory usage and only minimal additional processing power and memory bandwidth. Despite its simplicity, this practical model manages to reproduce the look of images rendered with other techniques (both offline and real time) such as photon mapping or diffusion approximation.
INDEX TERMS
subsurface scattering, real time, skin, translucency, perception, computer graphics, graphics and multimedia
CITATION
Jorge Jimenez, Veronica Sundstedt, Diego Gutierrez, David Whelan, "Real-Time Realistic Skin Translucency", IEEE Computer Graphics and Applications, vol. 30, no. , pp. 32-41, July/August 2010, doi:10.1109/MCG.2010.39
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