That is impressive. But am I the only one who don't think Doom is an especially good looking game? It has it's own style, yes, but it lacks the attention to detail (IHMO).
IMO gfx fits good to the type of game doom is. I think it is a pretty game overall but perception of whats is pretty may differ a lot from person to person. The open sections of some maps in doom may look weaker thou. One thing i was thinking all the time when playing doom is the engine and art style would be excellent for a game like DMC.