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Raytrace Extended Parameters Rollout 1519
R ay tra ce Extended Par ameter s
Rollout
Material Editor > Type b utton > M aterial/Map Browser >
Raytrace > Ex tended Parameters rollout
The Extended Parameters rollout for a Raytrace
material (page 2–1512) controls the material’s
special effects, transparency properties, and
advanced reflectivity.
Inter face
Exceptforthewireframecontrols,thecontrols
in the Extended Parameters rollout for Raytrace
mater ial are specific to the Raytrace material.
Special Effects group
Thecontrolsinthisgrouparespecialeffects.They
arepowerful,butyoumightneedtoexperiment
to use them effectively.
Object with raytrace material using translucency and
fluorescence
Ex tra L ighting—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 from the Basic Parameters
rollout.
By mapping this parameter, you can simulate
radiosity: theambientlightthatresultsfrom
reflected light in a scene. One effect of radiosity is
colorbleeding.Forexample,instronglightawhite
shirtnexttoanorangewallwillshowareflected
orange color.
Tra nsl ucency—Creates a translucent effect
(page 3–1027).TheTranslucencycolorisa
non-directional diffuse reflection. The diffuse
coloronanobjectdependsupontheangle
between the surface normal a nd the position of
the light source. By ignoring the surface normal
alignment, this color component simulates
translucent materials.
For thin objects, the appearance can b e like shining
alightonthebackofapieceofricepaper.Youcan
cast shadows onto the back of the paper and see
them projected through the paper; this works well