I'm not sure how well this renderer handles arbitrary scenes through. Pieces of broken glass are very suitable for GPU raytracing, because rendering them is not

I'm not sure how well this renderer handles arbitrary scenes through. Pieces of broken glass are very suitable for GPU raytracing, because rendering them is not a "branchy" task since there is no scattering, only definite reflection/refraction. The reflections also make it look like there were a lot more triangles. With Monte Carlo sampling you need 4x samples for .5x error, which means that a lot of samples are needed for scattered indirect illumination in a typical scene (I think in the order of 100 to 1000). In VCT you only need 7-13 samples but a lot of preprocessing.