Eugene d’Eon
Jig Lab, 2012


We present a dipole BSSRDF with modified diffusion asymptotics, improved exitance calculations and consistent boundary conditions.  This BSSRDF improves significantly upon the classical dipole model, requires negligible extra evaluation cost and is very easy to adapt in new and existing subsurface scattering algorithms.  While not as accurate as a diffusion model using an extended source, such as the recent quantized diffusion method, this dipole model is far easier to implement and is of potential interest in some rendering and measurement applications.  We include a comprehensive quantitative comparison between the classical dipole and the “better” dipole as well as quantized diffusion and benchmark Monte Carlo results for reference.