I decided to make my first actual background for my White's treefrogs, Fremont and Rio. I'm afraid I forgot to take build pics, but I can upload a picture of the finished product! I made the background out of pure clay cat litter and Eco Earth, then slathered a layer onto the back of the tank, then I scuplted some ridges and bumps and stuff, THEN I patted some more Eco Earth onto the moist sculpted clay and stuff. It actually looks really nice, and I'll upload some pics when I feel like it!