Subsurface Scattering

We attempted to implement the equation in Jensen 2.1: The current issue is the calculation of dv and dr. They are defined as follows: dr - ||x - xr|| or distance between our point and the real source dv - ||x - xv|| or distance between our point and the virtual source Looking further through the paper, these seem to perhaps depend on us calculating the single-scattering term and utilizing the point from there into this calculation but we are unsure as of now.

     This is our initial path tracer rendering the dragon. As you can see, subsurface scattering has not been implemented yet. Right now, it is rendering the Stanford dragon using brdf importance sampling, nee, ggx, and rr. This gives us the baseline so we can tell how subsurface scattering changes the dragon.