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文件名称:A_Practical_Model_for_Subsurface_Light_Transport.pdf
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更新时间:2014-04-04 20:13:31
Subsurface scattering, BSSRDF, reflection models,light
This paper introduces a simple model for subsurface light transport
in translucent materials. The model enables efficient simulation of
effects that BRDF models cannot capture, such as color bleeding
within materials and diffusion of light across shadow boundaries.
The technique is efficient even for anisotropic, highly scattering
media that are expensive to simulate using existing methods. The
model combines an exact solution for single scattering with a dipole
point source diffusion approximation for multiple scattering. We
also have designed a new, rapid image-based measurement technique
for determining the optical properties of translucent materials.
We validate the model by comparing predicted and measured
values and show how the technique can be used to recover the optical
properties of a variety of materials, including milk, marble, and
skin. Finally, we describe sampling techniques that allow the model
to be used within a conventional ray tracer.