Render time about 53 hours, 4090 samples per pixel.

Render time 9 hours and 4 minutes, 32400 samples per pixel.

Perlin texture, phong floor.

Three spheres, rendered with 400 samples.

Two spheres in a cornell box.

Cornell box with diffuse floor, rendered with 1089 samples per pixel.

Plane illuminated by a light modulated with a perlin texture. Renderered with 900 samples per second in 32 minutes.

Cornell box, rendered with 400 samples per pixel.

Same scene as above, with 900 samples per pixel and a refraction index of 1.7.

484 samples per pixel, rendering time 55 minutes

Point light, shadow rays and no recursion, with 4x4 samples per pixel.

Nice cornell box.