Calibrating Skin Weights

When adjusting skin weights using the Skin Weight Brush or manual input, you can employ the Calibrate feature to test the character's pose for accurate weight assignment. While the Skin Weight Brush is used as an example here, this feature works in both Painting and Vertex Selection modes.

1. Load a custom OBJ model in a new project. By default, it is set as an accessory.
   
2. Convert it into a piece of clothing with the Transfer Skin Weight tool.
   
3. Enter the skin-weight editing mode by clicking on the Modify > Attribute > Modify > Skin Weights button.
   
4. Right-click to select a target bone, in this case the left thigh. You will see the skin weight colors that are influenced by this bone.
   
   * In order to verify the skin-weights, the character must strike some poses.
5. Instead of leaving Skin Weights mode and using the Motion Editor to set character's pose, you can use Rotate Bone and Calibration.
   
   • Rotate Bone: Click the Rotate Bone (shortcut: E) button.
     
     The rotation gizmo will also display the pivot of the selected bone.
     
     Rotate the bone to examine the skin-weights.
     
   • Calibration: Access Pose or Body Rig in the Motion menu from the playbar; and choose the motions within them.
     
     Begin playback to observe the character assuming various poses, allowing you to assess the integrity of the skin weights. Pause the playback when encountering poses where mesh penetration occurs and carefully assess the defects.
     
   • Change to T-Pose: Temporarily applies the t-pose the character to facilitiate observation and editing.

     Change to T-Pose: Deactivated	Change to T-Pose: Activated

6. You can then use the Skin Weight Brush to paint on the surface, or use the Vertex Selection mode to enter an ideal values for the penetrating vertices.
   
   You can follow the same steps to examine, adjust, and fix the entire cloth.
7. Exit the Skin Weight mode and the mesh penetrations will be fixed.