My problem may be (unnecesarily) complex as i tried alot of things mostly unsuccesfully. If you have any better solution than mine, please tell me !

I'm trying to make a collar for a character, my idea was to make only a part of it, then array/curve or shrinkwrap it around the character's neck, then finally bake it
(unfortunately i have to bake it, my game doesnt accept too much polys and the collar is too complex)

https://i.sstatic.net/kvYDd.jpg

So i did a basic model, ready to receive the array modifier
Then made an basic armature of the body trying to make the collar fit

https://i.sstatic.net/ql8xU.png

And tried various things from shrinkwrap with the armature, array or curve and it never came right.

Factually, maybe the bake doesn't need it, or maybe i could make it right on a plane? I don't know. Maybe you'll have the right answer too.