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1346 Chapter 16: Material Editor, Materials, and Maps
Or ient ati on Ma pping
Material Editor > Standard material > Shader Basic
Parameters rollout > Anisotropic or Multi-Level shader >
Maps rollout > Or ientation butto n
Mapping anisotropy orientation
Yo u c a n s e l e c t a b i t m a p f i l e o r procedural
map (page 3–1091)
to control the Orientation
parameter. Orientation controls the position of
the anisotropic highlight. Mapping orientation
changes the highlight’s position. Black and white
values have little effect. Maps with a good deal of
grayscale values, such as
Noise (page 2–1484) or
Falloff (page 2–1480) ,canbeveryeffective.You
canalsogetagoodeffectusingthesamemapfor
orientation mapping and
bump mapping (page
2–1347)
.
The orientation parameter is available with the
Anisotropic (page 2–1321) and Multi-Level (page
2–1323)
shaders.
Reducing the Amount of the orientation map
reduces the map’s effect, and increases the effect
of the Orientation value on the Basic Parameters
rollout. When the Amount is 0 percent, the map
isn’t used at all.
The effect of mapping orientation, like anisotropy,
is not very apparent unless the specular level is
fairly hig h and glossiness is fairly low.
Tip: Using an instance of the same map to control
both anisotropy and orientation can give you good
control over anisotropic highlights.
Procedure
To map the orientation value:
1.
Click the Map button for Orientation.
The
Material/Map Browser (page 2–1291) is
displayed.
2. Choose from the list of map types, and then
click OK.
TheMaterialEditorisnowatthemaplevel,and
displays controls for the map parameters.
3. Usethemapcontrolstosetupthemap.