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Depth of field effects, rendered by tracing rays from random points on
a virtual lens as described in Cook's 1984 SIGGRAPH paper
Distributed Ray Tracing.
Both images are of the same scene, with different focal planes to draw
the viewer's attention to one of the two cubes.
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Cornell-style boxes, rendered with path tracing. The image on the left
shows color bleeding, due to indirect illumination of the white boxes by
the red and green walls. The image on the right shows a caustic formed by
the glass sphere focusing the light from above onto the floor.
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Glossy reflections, soft shadows. 17 CPU hours, almost a billion rays.
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Hemispherical light source.
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