Accelerating subsurface scattering using Cholesky factorization

摘要

In this paper we present a simplified subsurface scattering model that exploits a diffusion mechanism to provide a simpler solution to the transport equation. Our model is based on numerical analysis techniques that are amenable to Cholesky factorization. We treat the factorization as a precomputed scattering quantity which can be used to significantly speed up multiple scattering calculations as the global light source changes. On low resolution meshes, we have been able to achieve real-time solutions of the subsurface scattering while still maintaining good visual quality of the solution.