9

Raytracer Controls Rollout 1521
The Amount controls the amount of density color.
Reducing this value reduces the density color
effect. Range=0 to 1.0. Default=1.0.
A thin piece of tinted g lass is mainly clear, w hile
a thick piece of the same gl ass has more color.
The Start and End controls help you sim ulate this
effect. They a re expressed in world u nits. Start
is the position in the object where the density
color begins to appear. (Default=0.0.) End is the
positionintheobjectwherethedensitycolor
reaches its full Amount value. (Default=25.0) To
have a lighter effect, increase the End va lue. To
have a heavier effect, reduce the End va lue.
TheobjectmustbeatleastasthickastheStart
value before the density color is visible.
You can map this color component.
Fog—Density fog is also a thickness-based effect.
It fills the object with a fog that is both opaque and
selfilluminated.Theeffectislikesmoketrapped
in a glass, or wax at the tip of a candle. Colored fog
in tubular objects can resemble neon tubes.
To use, first make sure the object is transparent.
Click the color swatch to display the Color Selector.
Choose a color, and then tur n on the check box.
The Amount controls the amount of density fog.
Reducing this value reduces the density fog effect
and makes the fog translucent. Range=0 to 1.0.
Default=1.0.
The Start and End controls let you adjust the fog
effect based on the object’s dimensions. They are
expressed in world units. Start is the posit ion in
the object where the density fog begins to appear.
(Default=0.0.) End is the position in the object
where t he density fog reaches its full Amount
value. (Default=25.0) To have a lighter effect,
increase the End value. To have a heavier effect,
reduce the End value.
You can map this color component.
Render objects inside r aytr aced objects—Turn s the
rendering of objects inside raytraced objects on
or off. Default=on.
Render atmospher ics i nside r ayt ra ced
obj ects —
Turns the rendering of atmospheric
effects inside r aytraced objects on or off.
At mospher ic effects include fire, fog, volume light,
and so on. D efault=on.
Reflections group
Controls in this group give you finer control over
reflections.
Ty pe—When set to Default, reflections are layered
w ith the Diffuse color. For example, if t he material
is not transparent and completely reflective, no
diffuse color is visible. When set to Additive,
reflections are added to the Diffuse color , as in
Standard materials (page 2–1465).Thediffuse
componentisalwaysvisible.
Gain—Controls reflection brightness. The lower
the gain value, the br ighter the reflection. At a gain
of 1.0, no reflect ion is visible. Default=0.5.
R ay tr a cer Contr ols R ol lout
Material Editor > Type button > Material/Map Browser >
Raytrace material > R aytracer Controls rollout
The Ray tracer Cont rols rollout for a Raytrace
material (page 2–1512) controls affect the
operation of the raytracer itself. It can help you
improve rendering performance.