Selects all vertices where any face corner referencing that vertex has a bone index (with a nonzero weight) or a bone weight different from any other connected face corner.

When face corners referencing a vertex differ in bone index or weight, posing the referenced bones will cause gaps to open in the mesh geometry, because face corners topologically connected will have differing position offsets applied to them. Differing bone assignments can accidentally happen during rigging when using Face or Face Corner select modes without enabling [link]Inclusive Mode[/link]. This operation is provided as a way to detect and correct these errors.