- Select in UPM "Add package from git URL..."
- Install package with link.
https://github.com/AlexeyTaranov/ScaleRigConstraint.git
- Correct Rig Setup
- Add Scale Rig Constraint component (check correct components order of execution)
- Lock editor with scale component
- Push "Start Modify" button
- Modify any bones (current limit: 8 bones)
- Push "Apply" and save
- Try play and check result =)