
Add a Monte Carlo sampling bounce for indirect illumination. Num_photons = 1M, num_caustics = 1M, max_photons = 1000, radius = 0.5, max_bounce = 5, spp = 4.

Use photon mapping for indirect illumination only. Num_photons = 1M, num_caustics = 1M, max_photons = 1000, radius = 0.5, max_bounce = 5, spp = 4.

Use only photon mapping for direct and indirect illumination. Num_photons = 1M, num_caustics = 1M, max_photons = 1000, radius = 0.5, max_bounce = 5.

Still trying to do photon mapping for direct illumination.