galad, the enclosure for the forest floor scene is going to be 8' long and 18" high. I don't really know anyone good at art around here, but I was more looking for something that looks photo realistic anyway.
havenbounce, printing from the computer is an idea I considered previously, cuz you're right, they are some gorgeous wallpapers available. However my printer doesn't work anymore, so at the moment that option is unavailable to me.

Also, because the scene must go in the cage the prints would need to be laminated.
Any other ideas?