I’ve begun animating, finally and I noticed in the message log that window that it says the following are missing from the bind pose, then it lists every end joint_end That’s a lot of bones to add to a custom rig and I mmight make a mistake. Can I ignore this error or not?
In a general sense, the end bones are not important. Really, only the bones you actually make use of in some way, either for skinning or for some sort of targeting (in game), are important. In a lot of cases you can safely ignore warnings. Just make sure you’re getting what you need after importing… etc. If something looks broken, then pay closer attention to the warnings to track down the reason, if it’s not obvious.
If it’s a Blender rig you have mistakenly ticked the option Add Leaf Bones in the FBX exporter in Blender.
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Are they important that they are included?
Depends.
To add context end joints (aka end effectors) are required to switch between IK and FK but are not required as part of the skin bind solution.
Not knowing Blender, assuming that’s what you are using, it’s more of a warning that you have a child bone of a parent that is included but the child is not.
If you have extra bones in the skeleton it could affect the retargeting. The troubles with my mesh would’t go away with retargeting not until i got rid of all the extra finger bones, then he was able to target properly.