Page 1027 - Kitab3DsMax

Note
The orientation of the envelope spline is set by the longest dimension of the bone. This works well for arm and leg
bones, but the pelvis or clavicle may end up with the wrong orientation. n
The Envelope Properties section of the Parameters rollout (just below the Radius and Squash buttons)
includes five icon buttons, shown in Table 40.1. The first toggles between Absolute and Relative. All verti-
ces that fall within the outer envelope are fully weighted when the Absolute toggle is set, but only those
within both envelopes are fully weighted when the Relative toggle is selected.
TABLE 40.1 Chapter 40: Skinning Characters
Envelope Properties
Button Name Description
Absolute/Relative Toggles between Absolute and Relative

Envelope Visibility Makes envelopes remain visible when another bone
is selected
Falloff Linear, Falloff Sinual, Falloff Sets Falloff curve shape
Fast Out, Falloff Slow Out
Copy Envelope Copies envelope settings to a temporary buffer

Paste Envelope, Paste to All Bones, Pastes envelope settings to the selected bone, to all
Paste to Multiple Bones bones, or to multiple bones chosen from a dialog box

The second icon button enables envelopes to be visible even when not selected. This helps you see how
adjacent bones overlap. The third icon button sets the Falloff curve for the envelopes. The options within
this flyout are Linear, Sinual, Fast Out, and Slow Out. The last two icon buttons can be used to Copy and
Paste envelope settings to other bones. The flyout options for the Paste button include Paste (to a single
bone), Paste to All Bones, and Paste to Multiple Bones (which opens a selection dialog box).

Working with weights
For a selection of vertices, you can set its influence value (called its Weight value) between 0 for no influ-
ence and 1.0 for maximum influence. This provides a way to blend the motion of vertices between two or
more bones. For example, the vertices on the top of a character’s shoulder could have a weight value of 1.0
for the shoulder bone, a weight value of 0.5 for the upper arm bone, and a weight value of 0 for all other
bones. This lets the shoulder skin area move completely when the shoulder bone moves and only halfway
when the upper arm moves.

Note
The shading in the viewport changes as vertices are weighted between 0 and 1. Weight values around 0.125 are
colored blue, weight values around 0.25 are colored green, weight values around 0.5 are colored yellow, and
weight values around 0.75 are colored orange. n

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