2009

does not change during an animation. You must choose the value, based on
the size of the scene extents.
When off, the bias is computed relative to the rest of the scene, and then
normalized to 1.0. This provides a common starting bias value in scenes of
any size. If the scene extents change, this internal normalization can vary
from frame to frame. Default=off.
TIP Leaving Absolute Map Bias off gives good results in most situations, because
the bias is internally balanced to match the scene size. In animations, however, if
moving objects cause a large change in the scene extents (or if objects are
unhidden, and so on), the normalized bias value might become inappropriate,
causing shadows to flicker or disappear. If this happens, turn on Absolute Map
Bias. You will have to set the Bias control to a value appropriate for the scene. As
a rule of thumb, try a Bias value that is the distance between the light and the
target object, divided by 100.
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.
When off, backfaces are ignored, which can cause outside lights to illuminate
object interiors. Default=on.
The faces inside the sliced sphere do not cast shadows if 2-Sided Shadows is not
selected.
Sunlight and Daylight Systems
Create panel > Systems > Sunlight button/Daylight button
Sunlight and Daylight Systems | 5139