I have an idea that I'm not sure has been tried before. I didn't find anything in the search.

In a 3D haunt, I'd like to have one or several faces, or some other symbol, spear, blade, ect. cutout and backlit in a blue light. Then when a patron walks up, it is switched over to a red light. My theory is that it would almost be like an animatronic (visually) jumping off the wall. Has this been done? Any thoughts?