I decided I was getting tired of my old layout backdrop (Some cardboard painted sky blue) and headed over to Micheal's to see if they didn't have something better. And boy did they ever! They had sky blue bulletin board paper with clouds printed on it. Well fait accompli! I snapped it up in heartbeat.
When I got some home I grabbed some black, green and brown tempera paints and mixed up to distinct earthy-green colors. I used these to paint several "layers" of distant mountains on the cloud paper.
I have to say I was doubting my ability to pull this off, but I really like the result. It really adds a sense of depth to the layout.