Additional work done for the sentinel Barracks . This was a bit of a wide turn and wound up looking too much like hell due to the facility being placed on a lava plane (inspired by Darth Vaders Castle on Mustafar in Star Wars).
The design was closer in theme to the original Sentinel Station was in space then the floating techno castle in the final game.
Sentinel Space Station by Ethan Evans https://www.artstation.com/artwork/V209Eg
Art Direction By Emerson Tung https://www.artstation.com/emersontung
All Images © id Software, Zenimax Media Inc.