Duke Nukem 3D map.
..
Art, screen captures, icons, photos, 3D, Escape Velocity, Quake, Smaug,
etc
.
malldeth-screen-capture
Screen captures of the map.
malldeth.zip
(1289 KB)
This map is fairly detailed. The textures were "skillfully acquired" from the game "TekWar," which also used (what appears to be) the same engine.
From
http://neil.chaosnet.org/media/duke3d/
.