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Ray-Traced Shadow Parameters Rollout 1207
and improve speed, decreasing the value will
increase the sensitivity, improving quality.
Antialias S uppre ssion group
Super sampl ed Ma teri al—When on, only pass 1 is
used during 2-pass antialiasing when shading a
supersampled (page 3–1112) mater ial.
Note: When off, rendering time can increase
w ithout resulting in a better image.
Reflect/Refract—When on only pass 1 is used
during 2-pass antialiasing when shading
reflections or refractions.
Note: When off, rendering time can increase
w ithout resulting in a better image.
Coplanar Face Culling group
Sk ip Coplanar Faces—Prevents adjacent faces
fromshadowingeachother.Thisisofparticular
concern at the terminator on curved sur faces such
as spheres.
Threshold—The angle between adjacent faces.
Range = 0.0 (perpendicular) to 1.0 (paral lel).
Ray-Traced Shadow Parameters
Rollout
Create a light. > General Parameters rollout > Ray Traced
Shadows chosen > Ray Traced Shadow Params rollout
Ray-traced shadows
The Ray-Traced Shadow Parameters rollout
appears when you have chosen raytracing as the
shadow-generation technique for a light. You
select this in the
General Parameters rollout (page
2–1175)
.
For greater control of ray-traced shadows, use
Advanced Ray-Traced Shadows (p age 2–1200) .
Interfa ce
Bias— Ray-Tr ace Bias (page 3–1094) 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