Where can I get rear window pictures, as seen on campers?

[Solarjunkie]

I am looking for some transparent pictures to put on the back windows of my camper. I have in the past seen 2 sorts - one is full of little holes so works like net curtains, the other has a more metallic look so it is more like a film.
The pictures tend to be of waves, beaches, palm trees etc which is just what I'm looking for!
Does anyone know exactly what they're called and where I can get some? Thanks.