If someone before id thought up that design... (Score 0)

I'll be that someone. According to MobyGames it came out on Dec. 10, 1993. BUT Ultima Underworld 1 and 2 came out in 1992, a whole YEAR before Doom! Hell, id was still riding the success of Wolfenstein! Graphically they were almost even. Compare these screenshots:

http://www.mobygames.com/game/shots/p,2/gameId,6 91/gameShotId,9980/

http://www.mobygames.com/game/shots/p,2/gameId,1 068/gameShotId,24657/