I get what you mean, Sunday.
But, putting a person in there wouldn't be an A-grade idea in my book...
Actually, that could be an idea. See, you make the mirror model, and you taken a screenshot of what it would reflect (so, you have a reception room, you take a screenshot of the room from the mirror's point of view). Then, you just add it to the texture of a mirror model. And if you wanted it animated, you could just make a decal (using the script to make it stationary).
You wouldn't have the player in it, but it'd still be cool. Would make a nice addition to any vampire games, too.
Evil has a new name.