Abandoned Railway Station
I know this has more of a modern-y feel, but this is screaming at me that this is like a hall where Jace could've been at while he was a gladiator.
Minitutorials by Marcus Aseth - Polycount Forum
Helmets (with and without random grays), Jardin John Cobile on ArtStation at https://www.artstation.com/artwork/zzLoL
Space stations and space ships science fiction
FAQ: How u model dem shapes? Hands-on mini-tuts for mechanical sub-d AKA ADD MORE GEO - Page 131 - Polycount Forum
Avatar Amp Suit
London Fischer - Guide to Making Our Model - Polycount Forum