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1482 Chapter 16: Material Editor, Materials, and Maps
V iewing Dir ection (Camera Z-Axis)—
Sets the falloff
direction relative to the camer a (or screen).
Changing object orientation doesn’t affect the
falloff map. (Default.)
Cam era X/Y A xis—Similar to Camera Z-Axis.
For example, using Camera X-Axis with the
Toward/Away falloff type runs the gradient from
lef t (Toward) to right (Away).
Object—Picks an object whose orientation
determines the falloff direction. Click Pick, and
then pick an object in the scene. The falloff
direction is the direction from the point being
shaded toward the object’s center. Points on the
side toward the object center get the Towards va lue,
and those away from the object get the Away value.
Local X /Y/Z A x i s —Sets the falloff direc tion to one of
the object’s local axes. Changing the or ientation of
the object changes the fa l loff direction.
When no object is chosen, the falloff direct ion uses
the local X, Y, or Z axis of the object being shaded.
World X/Y/Z Axis—Sets the falloff direction to one
of the world coordinate system axes. Changing
object orientation doesn’t affect the falloff map.
Mode Specific Parameters group
The following are parameters for the Object falloff
type:
Object—Picks object from scene and puts its name
on the button.
The follow ing are parameters for the Fresnel falloff
type:
Override Material IOR—Allows change to the Index
of Refraction set by the material.
Index of R efraction—Sets a new Index of Refraction.
This option is unavailable unless Override Material
IOR is tur ned on.
The following are par ameters for the Distance
Blend falloff type:
Near Distance—Sets the distance at w hich the blend
effect begins.
Far Distance—Sets the distance at which the blend
effect ends.
Ex trapolate—Allows the effect to continue beyond
the Near and Far settings.
Mix Curve rollout
Using the graph on the Mix Curve rollout, you
can precisely control the g r adient produced by any
falloff type. You see the resulting gradient in the
bar below the graph.
Move flyout
Moves a selected point in any direction,
limited by the unselected points on either side.
Constrains movement to the horizontal.
Constr ains movement to the vertica l.
Scale Point—Scales the selected point within
the range of its gradient. On a Bezier corner point,
thiscontroliseffectivelythesameasavertical
move. On a Bezier smooth point, you can sc ale
the point itself or either handle. As with the move
cont rols, scale is limited by the unselected points
on either side.