I would LOVE to do this on a small scale (piece of plywood) and photograph my science posters against it. But, I would probably paint it white.
It's Written on the Wall: DIY Wall Art:Paper, Styrofoam, Canvas, Fabric, Ribbon?
Modern Wallpaper Wall Art for fridge as message board ect
Instant wall art made with napkins and squares of STYROFOAM. Brown dots are made from STYROFOAM discs and paper. Super-fast to make, and if .