An error seen in 3-D videogames in which a certain spot fails to render, which makes the game simply re-render whatever was in view there last. The repeating image seen in place of what should be there is the Hall of Mirrors error.
Multiple Halls of Mirrors is usually a sure sign of a newbie mapper.
by Nimbostratus February 10, 2005
"Hall of Mirrors" error seen in Doom II.