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1360 Chapter 16: Material Editor, Materials, and Maps
R ay tra ce E x tended Par ameter s
Rollout
Material Editor > Type button > Material/Map Browser >
Raytrace > Extended Parameters rollout
The Extended Parameters rollout for a Raytrace
material (page 2–1353)
controls the material’s
special effects, transparency properties, and
advanced reflectivity.
Inter face
Exceptforthewireframecontrols,thecontrols
in the Extended Parameters rollout for Ray tr ace
mater ial are specific to the Rayt race material.
Special Effec ts group
Thecontrolsinthisgrouparespecialeffects.They
arepowerful,butyoumightneedtoexperiment
to use them effectively.
Object with raytrace material using transluce ncy and
fluorescence
Ex tra Lighting—Adds light to the surface of objects
w ith the Raytrace material. You can view this as
an ambient lighting color that you can control on
a per-material basis, but don’t confuse it with the
ambient absorption f rom the Basic Parameters
rollout.
By mapping this parameter, you can simulate
radiosity: theambientlightthatresultsfrom
reflected light in a scene. One effect of radiosit y is
colorbleeding.Forexample,instronglightawhite
shirtnexttoanorangewallwillshowareflected
orange color.
Transl ucency—Creates a translucent effect
(page 3–1121)
.TheTranslucencycolorisa
non-directional diffuse reflection. The diffuse
coloronanobjectdependsupontheangle
between the surface normal and the position of
the light source. By ignoring the surface norma l
alignment, this color component simulates
translucent materials.
For thin objects, the appearance can be like shining
alightonthebackofapieceofricepaper.Youcan
cast shadows onto the back of the paper and see
them projected through the paper; t his works well