if you want a sword to appear across your back while looking away from the screen is not possible with the shield templates. If you want a sword to appear on your back while you're looking sideways its possible(just use the wing template).
the body might be a lil off, but not too bad
Attachment 15170
Attachment 15171
When it comes to back view and side views, the body takes priority in-game(meaning any part of the shield that touches the body comes out invisible in-game, something that has to do with what takes priority so graphics dont look ******ed. Example hats take priority over heads in order for them to work properly)
this shield might help you understand what i mean, it was uploaded by one of my buddies. Even though its placed on the back it does not appear in-game as a whole.
Attachment 15173
This is the code for it so you can put it on
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sample-shield-stomper.png