You use Jackie as the
surface to be bound to the skeleton.
To bind the skeleton using smooth skinning
- Select Jackie.
the back_root joint.
The back_root joint is
at the base of Jackie’s spine. If you are not sure which joint it
is, select it in the Hypergraph (
Window > Hypergraph: Hierarchy).
Skin > Bind Skin > Smooth Bind > .
- In the Smooth Bind Options window,
set Max Influences to 3, then click Bind
Influences value of 3 specifies that three joints influence
each skin point. By default, the joint closest to the point has
the most influence. The second most influential joint is that joint’s
parent or child joint, whichever is closest to the point. The third
most influential joint is the nearest parent or child of the second
joint. The influence drops with the distance from the joints. The
amount of influence each joint has on any skin point is the skin
The default skin weights
create smooth deformations of the skin at elbows, knees, and elsewhere
as the nearby joints rotate.
- Select and move any or all of the four
IK handles to pose the arms and legs in various positions in order
to get used to posing with the IK handles.
To select an IK handle,
drag a selection box around a wrist or ankle joint. To move a handle,
use the Move tool to drag the handle in the desired direction.
You can also select
the IK handles in the Hypergraph
The handles are indented under jackieSkeleton. Each is named for
a leg or arm, for example, ikHandleLeftLeg. For more details on
IK handles, see
Lesson 1: Skeletons and kinematics
- If you
prefer to turn off the skin’s transparency so you can see the skin more
clearly, turn off Shading > X-Ray.
Do not be concerned that
the skeleton pokes through the skin, as the skeleton is not displayed
in a rendered image.
As you pose the arms
and legs, examine the skin in the regions where joints bend. For
many poses, the skin looks natural. For others, the skin folds,
compresses, or bulges unnaturally. The pelvis, shoulders, and torso are
common problem areas for various poses. For example, if you move
an arm straight up, the shoulder compresses as in the following
are two ways to improve the smooth skin deformations: