Remember the dear little ghost, Casper, who could walk through walls? Now you can too have close to similar powers! Yes, although you will have to wait a while before you can walk through walls, for the time being, you can see through walls.
Transparent concrete from Andreas Bittis. Made with 4 percent built-in optical fibers, this Transparate Concrete is, strictly speaking, actually semi-transparent. So, let your imagination run wild and invent ways in which you can use it.
Lemme nip the naughty ideas in the bud by making it clear beforehand that it is semi-transparent both ways. You peep through it, and you are caught in no time!
Rotten jokes apart, I believe it is going to make a great light-and-dark play in your room, when placed in the main light point, e.g. at the door between the balcony and living room. You can probably use it as a partition for you kitchen and dining space, or for that matter, between any two spaces serving different functions.
It struck me that you can actually put up a kind of shadow performance with it, you know. See the above picture above and you will know what I mean.
Source: I New Idea