RTF is a global modification that replaces all towns in the game.

Personally, I think all three of them need different helmets: the rounded ones don't quite fit, and the ones with a visor and eye slits are definitely not in the dwarven style...

They need angular, massive ones, and with a definite place for ornamentation!

In the photo, there are helmets for the basic creature and the upgraded version, and for the alternate upgrade, you can find them in the links above...