There mentioning several acronyms:
“COR”, “DEF”, “GEO”, “MCH”, “ORG”, “VIS”
Searching around and I found these definitions:
DEF - Deformation bone. These are the bones the model is actually bound to
MCH - Mechanical helper bone. Usually part of more complex bone mechanisms
ORG - The Original bones from the meta rig, used to generate and regenerate the rest of the rig
GEOmetry, I would assume, and VISual- my guess would be that VISual is for bones that provide visual information but don’t serve a function, like a picker surround:
COR is for Corrective bones i guess, a secondary deformation bone for problematic area such as muscle expansion when bending an arm. similar to corrective shape keys?
