Wait... you are apologizing for posting a cute picture of a corn snake?
If I were going to build a viv, I would not use melamine. I built a rack out of it once, and it is heavy, expensive, and hard to work with. I have another homemade rack made out of plywood that I then coated with I-don't-remember-for-sure-what sealant, and I like that one much better. You could also paint the plywood before sealing it if you don't want the wood look.
If you google something like "DIY rock background" you'll find a wide variety of how-tos.