I was updating old spine that is not very well organized and I found that animation keys are not moving with the attachment when I try to merge attachments from multiple slots.
For example, I have the following slot / attachment combinations
[Slot] Mouth_Smile
[Attachment] Mouth_Smile
[Slot] Mouth_Speak
[Attachment] Mouth_Speak
I want to merge them to this:
[Slot] Mouth // renamed from Mouth_Smile
[Attachment] Smile
[Attachment] Speak // moved from Mouth_Speak slot
After merging, I found that the Speak attachment that is moved to the new slot have the visibility animation keys lost. It should be moving with the attachment!
Please note that even if the final result is incorrect because of extra keys, deleting those extra keys are much easier than recreating what is lost!
Thanks.
