Hey guys, just wanted to say I think this is a really cool idea! I will have to try it.
I wonder if you could sort of sandwich some paper in between the plastic bags? Would you be able to see what was on the paper through the plastic bags? Hmmm... definitely worth trying out I think! It would make the fabric a little stiffer where there was paper I imagine... but if you could find mostly white or solid-colored bags and put some sort of image behind them, it might be kinda nifty!
If someone tries this, let us know how it turns out. I wish I had time to do it myself but I probably won't for a few weeks!