8

Anisotropic Highlights 1333
is best previewed against a pattern background
(page 2–1277)
inthesampleslot.
Clickthemapbuttontoassignamaptothe
opacity component. See
Opacity Mapping (page
2–1344)
.Thisbuttonisashortcut:youcanalso
assign opacity mapping in the
Maps rollout (page
2–1315)
.
S pecul a r Hi ghli ght Contr ol s
Anisotropic Highlights
Material Editor > Standard material > Anisotropic Basic
Parameters rollout > Specular Highlight group
Material Editor > Raytrace material > Raytrace Basic
Parameters rollout > Shading: Anisotropic > Specular
Highlight group
Anisotropic highlights are good for modeling hair,
glass, or brushed met al.
Note: For the Raytrace material (page 2–1353) ,
the Specular Color component appears in the
Specular Highlight group. Also, highlight controls
that don’t pertain to the current shader are labeled
“N / A.”
Pr ocedur es
To increase or decrease the size of a highlight:
• Change t he Glossiness value.
ThewidthoftheHighlightcurvesandthe
high lights in the preview change. At 0%
glossiness, the curves are at their maximum
width. At 100% glossiness, both curves are
extremely narrow.
To increa se or decrease the str ength of a highli ght:
• ChangethevalueofSpecularLevel.
TheintensityoftheHighlightcurvesand
the hig hlights in the preview change. At 0%
specular level, there is no highlight. At 100%
specular level, the curves are at their maximum
height with no overloading. At values greater
than 100% , the curves are overloaded: they
grow wider, and a wider area is at the maximum
highlight intensity.
TheshapeoftheHighlightcurvesaffectsthe
blending between the specular and diff use color
regions of the material. The steeper the curve,
the less blending there is and the sharper the
edge of the specular highlig ht.
To adjust the shape (anisotropy) of the highlight:
• Change t he value of Anisotropy.
The w idth of the white highlight curve and
the hig hlights in the preview change. At 0%
anisotropy, b oth highlight cur ves are the same
and the highlight is circular, as in Blinn and
Phong shading. At 100% anisotropy, the white
highlight curve and the highlights are extremely
narrow.
To adjust the orientation of the highlight:
• Change the value of O rientation.
Highlights in the preview show the change in
orientation. The display of the highlight curve
does not change.
Interfa ce
Specular Level—Affects the intensity of the specular
highlight. As you increase the value, the highlight
grows brighter. Default=5.