Simulating Sub-Surface Scattering of Illumination for Simulated Three-Dimensional Objects

摘要

Embodiments involve simulating sub-surface scattering of illumination for three-dimensional objects. An application determines, for each point defining a simulated three-dimensional surface, a respective first simulated light at the point caused by a simulated light source illuminating the three-dimensional surface. Each first simulated light includes a weighted average of simulated incident light at the point. Each weighted average is determined based on simulated incident light contributions from neighboring points of the three-dimensional surface. The application also determines, for each point, a respective second simulated light at the point. Each second simulated light includes light from the light source that is diffusively reflected at the point. The application also generates, for each point, a respective correction factor for the simulated light source to compensate for a difference between the first and second simulated lights by specifying a modification to color information generated based on the second simulated light.

主权项

1. A method for modifying color information applied to a simulated three-dimensional surface to simulate illumination of the surface, wherein the modified color information simulates sub-surface light scattering through the surface, the method comprising:
determining a first simulated light value at a point on the three-dimensional surface, wherein the first simulated light value represents an amount of light that is received from a simulated light source and diffusively reflected at the point; determining a second simulated light value at the point, wherein the second simulated light value comprises a weighted average of amounts of simulated incident light that are contributed from neighboring points of the three-dimensional surface, the weighted average representing a scattering of the simulated incident light from the neighboring points through the three-dimensional surface; and generating a correction factor based on a difference between the first and second simulated light values, wherein applying the correction factor to the color information simulates the sub-surface scattering.