To open the Stiffness attributes
- With the character skeleton selected, from the
Attribute Editor, choose the HIKproperties tab
The Stiffness attributes represent how much a character body part resists when being transformed. By default, the stiffness settings are set to replicate human movement. Some body parts that typically start by moving slowly, such as the hips, take more time or a more exaggerated movement to move quickly.
To control the amount of stiffness, drag the slider, or type a precise value in the numerical field. Use the following guidelines when manipulating stiffness:
- At 100%, the body part is stiff and resists transformation.
- At 50%, the body part averages between fully stiff and fully fluid movement. Transformation starts off slowly and gradually speeds up.
- At 0%, the body part moves fluidly and constantly without a slow start.
Some body parts have additional stiffness settings or function differently than described above. Additional settings and exceptions are described in the rest of this section.
- Neck Stiffness
- Lets you adjust the stiffness of the neck in your character.
Tip: You can use the
Neck Motion Reduction setting in the
Retarget Specific attributes to dampen the range of neck movement. The
Neck Motion Reduction setting is useful to correct motion created from inadequate capture data.
- Left/Right Shoulder Stiffness
- Lets you adjust the stiffness of the left and right shoulders in your character.
- Left/Right Arm Stiffness
- The left/right arm stiffness settings include additional settings for adjusting the stiffness and limits of elbow bending. Left/Right Arm Stiffness must be set to a value other than zero to take advantage of these additional stiffness limits.
| Setting
|
Description
|
|---|
| Left/Right Elbow Max Extension
|
Use this setting to dampen left or right arm movement as it fully extends to prevent elbow and limb snapping. The higher the value, the more gradually the limb extends. By default, a value of 50 corrects most limb snapping.
|
| Left/Right Elbow Compression Factor
|
Use these settings to change the stiffness of an extended arm as it bends. At 100% (full effect) the extended arm does not bend, but instead pushes the character’s chest, moving the character.
|
- Chest Stiffness
- Lets you adjust the stiffness of the chest in your character.
- Spine Stiffness
- Spine Stiffness is effective on characters that have complicated spines. This option stiffens the rotation of the spine of a character so that bending the character appears more rigid when bending.
- At 100%, the spine is rigid. Bending is not compensated for by every spine object. At 0%, the effect is the same as disabling the option, so the spine bends freely.
- Hips Stiffness
- Lets you set the percentage of resistance for the hips. You can also expand the Hips stiffness setting to view the Enforce Gravity setting.
| Setting
|
Description
|
|---|
| Enforce Gravity
|
Forces the hips of the character between its feet. By default, Hips Enforce Gravity is set to 60%. You must set Hips Stiffness to a value other than zero to take advantage of the Enforce Gravity setting.
|
- Left/Right Leg Stiffness
- The left/right leg stiffness settings include additional settings for adjusting the stiffness and limits of knee bending. Left/Right Leg Stiffness must be set to a value other than zero to take advantage of these additional stiffness limits.
| Setting
|
Description
|
|---|
| Left/Right Knee Max Extension
|
Use these settings to damp the leg as it fully extends, to prevent knee and limb snapping. The higher the value, the more gradually the limb extends. By default, a value of 50 corrects most limb snapping.
|
| Left/Right Knee Compression Factor
|
Use these settings to change the stiffness of an extended leg as it bends. At 100% (full effect) the extended leg does not bend, but instead pushes the hips of the character, moving the character.
|