
No Fresnel. Samples per pixel: min=32, max=32. 32 Samples per hemisphere. Uniform hemisphere sampling. Render time is 1:52:17.

No Fresnel. Samples per pixel: min=32, max=32. 32 Samples per hemisphere. Cosine-weighted importance sampling. Render time is 1:20:56.

Samples per pixel: min=2, max=64. 64 Samples per hemisphere. Cosine-weighted importance sampling. Render time is 3:45:10.