the great stuff has to be treated. You can do cool things by carving it and painting it or sticking stuff in it, but the paint has to be sealed, making sure it is safe for reptiles.
You can do similar things with styrafoam that you carve, and put grout over it. That you can imbed sands or pebbles, moss, and other things to make a natural look along with painting.
For sticks many people use PVC pipe that they burn with a torch to give texture and then paint it looks very natural once its done.
Remember always use great stuff and sealers in very well ventilated areas and take breaks often.
Kendalle is right.
Once the Great Stuff foam is treated with a sealer it is perfectly safe.
In my case I used black 100% silicon with coco fiber pressed to it.
My next attempt is going to used sand instead of the coco fiber and make cliffs and caves.
Breathers are very important. I work in my open garage and still needed to get out and breath.
Oh that sounds so fun to make!! It seems like a very satisfying project to create,cool ^-0
It is quiet fun to make, if you like to shoot foam out of a can and get messy covering it in silicon.
Some of these great stuff created walls are amazing. They look so much like the real deal it is amazing.
There are some AMAZING ones that look very realistic.