I've seen this before, it's just regular concrete with fiber optic cables running through it.
There were a few neat configurations of blocks you could get that would do neat things, like transposing the image on the other side upside down, or reversed, or even bend around objects in the wall to give the appearance that there was nothing in the wall.
What I want is a special application that I can use in my basement so that the basement walls appear to look outside as if they were at ground level. :-)
