Unbiased Light Transport Estimators for Inhomogeneous Participating Media

In this supplementary material we provide the details of the single scattering methods that use the medium manipulation scheme proposed in the paper entitled “Unbiased Light Transport Estimators for Inhomogeneous Participating Media”. 1. Single scattering of point source lighting In this supplementary document we consider a practically important special case of participating media rendering, the computation of single scattering of the light of a point source located at~l (Figure 1). As area lights can be approximated by many point sources, and multiple scattering can be simulated by introducing Virtual Point Lights [ENSD12], this basic operation can be extended to a complete global illumination renderer. We take the adjoint approach and implement path tracing, thus traced particles are importons and their weight E will be the visual importance.