2009

Interface
Bias Ray-Trace Bias on page 8102 moves the shadow toward or away from the
shadow-casting object (or objects).
If the Bias value is too low, shadows can "leak" through places they shouldn't,
producing moire patterns or making out-of-place dark areas on meshes. If Bias
is too high, shadows can "detach" from an object. If the Bias value is too
extreme in either direction, shadows might not be rendered at all.
2-Sided Shadows When on, backfaces are not ignored when calculating
shadows. Objects seen from the inside are not lit by lights from the outside.
This costs a bit more render time. When off, backfaces are ignored. Rendering
is quicker, but outside lights illuminate object interiors. Default=on.
The faces inside the sliced sphere do not cast shadows if 2-Sided Shadows is not
selected.
Max Quadtree Depth Adjusts the depth of the
quadtree on page 8100 used by
the ray-tracer. Greater quadtree depth values can improve ray-tracing time at
the cost of memory use. However, there is a depth value where the performance
5134 | Chapter 18 Lights and Cameras