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Light Tracer 47
smoothness of the effect, at a cost of render time.
Decreasing this value results in a grainier effect,
but renders more quickly. Default=250.
Tip: To get a “ f i r s t dr af t” prev i e w of t h e e f fect of
light t racing, reduce the value of Rays/Sample and
the Filter Size.
Changing the number of rays per sample.
The higher the value, the less grain.
Color Filter—Filters all light falling on objects. Set
to a color other than white to tint the overall effect.
Default=white.
Filter Size—The size, in pixels, of the filter used to
reduce noise in the effect. Default=0.5.
Tip: Filter Size is especially useful when Adaptive
Undersampling is tur ned off, and Rays/Sample has
alowvalue.
Changing the filter size.
Increasing the filter size reduces noise in the rendering.
Ex tra Ambient—When set to a color other than
black, adds that color as extra ambient light on
objects. Default=black.
Ray Bias—Ray Bias, like Ray-Trace Bias for shadows
(page 3–1094)
, adjusts the positioning of the
bounced light effects. Use it to correct rendering
artifacts, such as the banding that can occur when
an object casts shadows on itself. Default=0.03.
Bounces—The number of light-ray bounces that
are traced. Increasing this value increases the
amount of color bleeding. Lower values give faster
results with less accuracy, and typical ly produce
darker images. Higher values allow more light
to flow through the scene, resulting in brighter,
more accurate images at a cost of rendering time.
Default=0.
WhenBouncesequals0,theLightTracer
disregards volumetric lighting.
Tip: If your scene has transparent objects such as
glass, increase Bounces to be greater than zero. Be
aware that this increases rendering time.