Sentence:  Does anyone know about the <WSD>Hall of Mirrors</WSD> effect in the game of DOOM? I have recently been making my own levels of doom and in some places the hall of mirrors effect is in full effect. It happens especially in my biggest rooms that are very complex. 
Meaning of the word marked with <WSD> tags:  A glitch in some three-dimensional games where a missing texture prevents part of the scene from being rendered correctly, causing a trail of previously rendered frames to appear instead.