I clipped a piece from the Erol Otus cover illustration for the 1980 Dungeon Masters Adventure Log. I love this illustration, it really gives you the feeling I associate with all the megadungeon discussion that's been buzzing around all the grogblogs lately. I like how the torch flame is washing across the ceiling of the corridor. I'll post the unclipped version after I rescan it. Somehow, I deleted the original.