I downloaded this https://www.blendswap.com/blend/2584
and started to play around with it, but quickly I noticed there were these orange dotted lines that never appear in any files. Seemed like the indicated the IK relation. The problem is, for most bones, there is no IK relation! Somehow the file is able to pretend there’s an IK relation between bones when there’s no modifiers for it, like the head! It’s a haunted file!
On top of that there is some other weird unknown relation with it’s ankle IK where when I try and move them at the same time as the hips they make the armature spin an extra amount. Normally this would be an indication of some kind of rotation limit, but there aren’t any!
The shrinkwrap modifier doesn’t seem to work on these mystery IK bones either. They should have the freedom to deform, and even though the shrinkwrap modifier is checked, literally nothing happens with any of the settings.