The Black Death Steam Workshop Download repository for guides and example assests.
Helment Guide https://github.com/SmallImpactGames/TBDWorkshop/blob/master/TBD-Workshop%20Asset%20Guidelines-%20Helmet.pdf
Example https://github.com/SmallImpactGames/TBDWorkshop/raw/master/TBD_EXAMPLE_HELMET_WORKSHOP_ASSET.zip