8

Raytrace Basic Parameters Rollout 1357
change the color, click the swatch and then use
the
Color Selector (page 1–157) .
•
Mono spi nner—When the check box is off, the
reflection color component is gray, and this
spinner lets you adjust the gray va lue.
•
Fr esn e l —Clicking the check box a second time
displays this option. When active, applies a
Fresnel effect to the reflection. This can add
a bit of refraction to the reflecting object,
dependingontheviewingangleoftheobject.
Click the map button to assign a map to the reflect
component. This button is a shortcut: you can
also assign reflect mapping in the
Raytrace Maps
rollout (page 2–1364)
.
Lumi no si t y —Similar to the Standard material’s
self-illumination component, except that it
does not depend on t he diffuse color. You can
have a blue diffuse object with red luminosity.
Default=black.
Note: When Luminosity is off, the name of this
control changes to Self-Illum (Self-Illumination).
•
Lumi no si t y check box—When on, the material
uses a luminosity color. When off, the material
uses a spinner to set a gr ayscale va lue only for
self-illumination. Default=on.
•
Co lor swatch—When the check box is on, the
color swatch shows the luminosity color. To
change the color, click the swatch and then use
the
Color Selector (page 1–157) .
•
Mono spi nner—When the check box is off, the
luminosity color component is gray, and this
spinner lets you adjust the gray va lue.
Clickthemapbuttontoassignamaptothe
luminosity component. This button is a shortcut:
you c an also assign reflect mapping in the
Raytrace
Maps rollout (page 2–1364)
.
Trans parency—Similar to the standard material’s
filtercolorfortransmittedlight,combinedwith
the standard material’s opacity controls. This
color filters scene elements that are behind the
object with Raytrace material. Black is opaque,
white is fully transparent, and any value in between
filters objects behind the rayt r aced object. A
fully saturated color in b oth the diffuse and
transparency components gives the effect of tinted
glass.Ifyouwantmoreofanopaquelook,pickthe
color you want as a transparent color, copy it to the
diffusecolor,makethediffusecolorfullysaturated,
and then adjust the transparency to get the effect
you want. Default=black (no tr ansparency).
If rayt racing is turned off (in the Rayt racer
Controls rollout), the object still refracts the
environment mapping, but ignores other objects
in the scene.
Note: By separating the diffuse, reflect, and
transparency components, Ray trace material g ives
you a great deal of control over how the object
reacts to its environment. For example, an object
might diffusely reflect red, specularly reflect green,
and transmit blue. This is not a real-world effect,
butitcanbeuseful.
•
Transparency Color check box—When on, the
material use s a transparency color. When off,
the material uses a spinner to set a gr ayscale
value only. D efault=on.
•
Co lor swatch—When the check box is on, the
color swatch shows the transparency color. To
change the color, click the swatch and then use
the
Color Selector (p age 1–157) .
•
Mono spinner —When the check box is off, the
transparency color component is gray, and this
spinner lets you adjust the gray va lue.
Clickthemapbuttontoassignamaptothe
transparency component. See
Filter Color
Mapping (page 2–1344)
.Thisbuttonisashortcut:
you can also assign reflect mapping in the
Raytrace
Maps rollout (page 2–1364)
.
Index of R efr. (Refraction)—The index of refraction
(IOR) controls how severely the material refracts