2008

Upper left: Ray depth is zero
Upper right: Ray depth of 2
Lower middle: Extremely high ray depth
Maximum Depth Sets the maximum recursion depth. Increasing this value
potentially increases the realism of your rendered scene, at a cost of rendering
time. You can reduce this value to reduce rendering time. Range=0 to 100.
Default=9.
Cutoff Threshold Sets a cutoff threshold for adaptive ray levels. If the
contribution of any ray to the final pixel color drops below the cutoff
threshold, the ray is terminated. Default: 0.05 (5% of the final pixel color).
This can speed up your rendering time considerably.
Color to use at Max Depth As a rule, when a ray reaches the maximum
depth, it is rendered the same color as the background environment. You can
override the color returned at maximum depth by either selecting a color, or
setting an alternative environment map. This can make the "lost" ray invisible
in the scene.
6032 | Chapter 18 Rendering