The rocks are made of foam insulation as sold at Home Depot. It comes in 4x8 sheets, about 2 inches thick, and is a light blue color. I was trying to decide which kind to get when a guy down the street set a whole truck load (literally) out at the curb as trash. I don't know what he was using it for, but he had tons of waste, and said I could have it. I had tried carving regular white styrofoam in the past with knives and razors, but the little tiny balls that it is made of went absolutely everywhere, and stuck to everything with static cling you wouldn't believe. A shop vac with a bag was the only way to clean them up. This light blue foam was also a pain to cut, but not quite as messy. Then I got a hot-wire cutter from Amazon:
http://www.amazon.com/Proxxon-27082...36739959&sr=8-6&keywords=hot+wire+foam+cutter . It isn't perfect, but it does work. You can bend the hot wire into different shapes and pull it through the foam, creating really nice forms. I glued the layers together with Gorilla Wood Glue, then carved them all at once. Keep the glue thin, as it's harder to cut. I studied internet photos of rock outcrops until I felt I knew the effect I was going for, then attempted to recreate this in foam. My skill just isn't that good. I went through tons of foam trying to achieve a specific look, then just ended up "winging it". Once I set aside my preconceived ideas of what it should look like, I just carved randomly. And it worked! I painted everything with a satin black enamel paint, like I used on the outside of the enclosures. Then I used regular acrylic craft paints to wash them in a few shades of gray, a little brown, and then some green. A few more dabs of glue and some dead sheet moss that I bought was the final touch. I did add a bit of green paint to highlight the moss some. (It was dead, not preserved)
My daughter has the only decent camera in the house, and she's not around right now. I'll have to wait for her to get pics of how it comes apart, but I really just built it in sections, all fit together. There are half a dozen hides in each enclosure, some high, some low, some with a heat source, some colder, and one with a plastic container with damp cypress mulch inside. I've read that cypress is harmless to reptiles and resistant to mold.
My philosophy? That's deep. Ok, if the cage doesn't meet the snakes requirements, it isn't worth having, and if it doesn't meet yours, you won't want to have it. I probably made both of these too complicated, and definitely too small for the species I've put into them to start with. My Baron's Racers will outgrow them quickly, and I"ll have to look for something smaller to put in there. My Blue Barons is just perfect, though, for the Avatar themed one!