Did you have any trouble learning how to use the spray foam stuff at first? You ended up with a great job in making it look like tree branches/roots.
My terrarium is going to be much smaller (~45 gallons), and I'm hoping to make it look like the base of a tree mixing in some ferns, moss and orchids (mostly my miniature Angs). With a misting system and a fogger I'm hoping to be able to simulate a cloud forest type environment.
Mistking
Looking for a misting system? Look no further. Automated misting systems from MistKing are used by multitude of plant enthusiasts and are perfect for Orchids. Systems feature run dry pumps, ZipDrip valve, adjustable black nozzles, per second control! Automatically mist one growing shelf or a greenhouse full of Orchids.