Tip on the lights via Today and Tomorrow. The effect you see is pretty simple: It’s a mirrored cube, with its interior edges lined by fluorescent lights. Each side of the cube is a two way mirror, with the opaque side facing outward, so that you can see “inside” the cube, and its infinite reflections. Ergo, the sense of limitless depth. (More about the lights, at this crap website. They were designed by For Use, a very good furniture design outfit.) Josiah McElheney’s lightbox sculptures work the same way.  More McElheney stuff: