I have a bunch of creatures that all share the same “Master” Skeleton and in all cases but one they can merge (they sometimes have different appendages).
In the one that cannot merge it gives me the “FAILED TO MERGE BONES” error because it has hierarchical changes, though I cannot find these changes. I ran a python script to check the difference between the hierarchies and there is no difference, so instead I tested it in the following way:
-
I saved two versions of the skeleton that cannot merge and deleted the extra appendages on one of them
-
Imported the version with the deleted bones, which -can- merge with the original “master” skeleton
-
Imported the version with the deleted bones without merging
-
Imported the version with the bones still intact and merged it with the version with the deleted bones, which also -can- merge
What could cause the issue that the extra appendages cause a hierarchical error?
Possible thoughts I had:
Is it possible that joints that have no skinning information are ignored in the hierarchy?
Is it possible the non-hierarchical order of joints in the tree makes it look like a different skeleton (e.g. underneath pelvis normally you find hip_r, hip_l but with an extra appendage you now find hip_r, tail_m, hip_l)?