9

Raytrace: Refractive Material Extensions Rollout 1709
Inter face
Internal D ensity E ffects
Co lor—With t hese controls, you can specify a
transmission color based on thickness. The
density color gives the appearance of color within
the object itself, like tinted glass.
•
Enable—Turns color densit y on or of f.
•
Co lor swatch—Displays a Color Selector (page
1–161). Cho ose t he tr ansmission color.
•
Amount—Controls the amount of density color.
Reducing this value reduces the density color
effect. Range=0 to 1.0. Default=1.0.
•
Co lor Map—Assigns a map to the density color
component. Use the check box to enable or
disable the map.
•
Start and End—Athinpieceoftintedglassis
mainly clear, while a thick piece of the same
glass has more color. Start and End Distance,
expressed in world units, controls help you
simulate this effect. Start is the position in the
object where the density color begins to appear
(Default=0.0). End is the position in the object
where the density color reaches its full Amount
value. To have a lighter effect, increase the End
value. To have a heavier effect, reduce the End
value.
Fog—Density fog is also a thickness-based effect.
It fills the objec t with a fog that is both opaque and
self il luminated. The effect is like smoke trapped
in a glass, or wax at the tip of a candle. Colored fog
in tubular objects can resemble neon tubes.
•
Enable—Turns fog on or off.
•
Co lor swatch—Displays a ColorSelector(page
1–161) for choos ing the fog color.
•
Amount—Cont rols the amount of density fog.
Redu cing this value reduces the density fog
effect and makes the fog translucent. Range=0
to 1.0. Default=1.0.
•
Co lor Map—Assigns a map to the fog
component. Use the check box to enable or
disable the map.
•
Start and End—Start and End Distance controls,
expressed in world units, adjust the fog effect
based on the object’s dimensions. Start is the
positionintheobjectwherethedensityfog
begins to appear (default=0.0). End is the
positionintheobjectwherethedensityfog
reaches its full Amount value. To ha ve a lighter
effect, increase the End value. To have a heavier
effect, reduce the End value.
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.
Treat R ef ra ctions a s Gla ss (Fresnel ef fect)— When
on, applies a Fresnel effect to the refraction. This
can add a bit of reflection to the refracting object,
depending on the viewing angle of the object.
When off, the object is refractive only. Default=on.