Hey, guys! I just can’t figure out the purpose of the “Lock ori” attribute. It’s located on my SpineUI, which I combined with my head UI to reduce the number of settings controllers.
By default, the attribute is active. When the Head Ref is set to “Self” and I change the attribute’s value to 0, it simply tucks in the chin by rotating the FK head controller towards the chest. However, the orientation doesn’t get locked or unlocked, as I can still rotate the controller and it follows the selected space. When any other Head Ref is set, the tuck-in rotation reverses again, and I still can’t see any use for this attribute.
If someone could explain how this attribute works, I would greatly appreciate it. It would also help me come up with a proper name for this attribute to clearly describe its actual functionality. 
Thank you for your time!