This is my version of the Rogue one Darth Vader helmet. I used several reference images from the quasimodo helmet, screenshots from RO, a 3D scan derived from the RO helmet used, and some help from a couple 501st Vader gurus. This model should be 501st approvable if prepared right.

NON SYMMETRICAL like the movie helmet

I can print the facemask upside down with supports only at the base and nothing anywhere else. The eyes print with a few loose strings with out support but nothing that's harder to clean up then support scars.

The Dome I made split in 4 pieces and a version of the rear pieces split again so there is a 4 piece or 6 piece option for ease of printing.

I made the tubes separate so that it prints cleaner.