garageCube

On the website for the mapping festival there are pictures of a screen made up of plastic squares hung in a grid by small metal hooks. Is this special material or just white or translucent plastic? Front or rear projected? What kind of company fabricated these?
I'm interested in doing something similar as it looks really cool! Thankyou,
Michael

http://www.mappingfestival.com/mapping2007/

these are treated wood plates (you know, the agglomerate one with a white surface on it?!?) It's not retroprojected, so it's not transluscent too