8

Raytrace: Refractive Material Extensions Rollout 1519
Inter face
Internal D ensity Effects
Co lor—With these 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 off .
•
Co lor swatch—Displays a ColorSelector(page
1–157)
. Choose the transmission 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 a nd 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 posit ion in the
object where the density color begins to appear
(Default=0.0). End is the posit ion 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 t he End
value.
Fog—Densit y fog is also a t hick ness-based effect.
It fil ls the object w ith a fog that is b ot h opaque and
self illuminated. 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
1–157)
for choosing 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— Assig ns 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 t he 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 have a lighter
effect, increase the End value. To have a heavier
effect, reduce the End value.
Render objects inside r aytr aced obj ects—Tur ns the
rendering of objects inside raytraced objects on
or off. Default=on.
Render atmos pheri cs inside r ay tr aced
obj ects —
Turns the rendering of atmospheric
effects inside raytraced objects on or off.
At mospher ic effects include fire, fog, volume light,
and so on. Default=on.
Treat R ef ra ctions a s G las s (Fres nel ef fect)— When
on, applies a Fresnel effect to the refraction. This
can add a bit of reflection to the refract ing object,
depending on the viewing angle of the object.
When off, the object is refractive only. Default=on.