New to building Gecko Safe hides, tips and tricks?

[Notlad]

Id like to make my Gecko enclosure a little more fancy for my Leo. My plan is to create two new hides to get rid of the old mundane ones, being a hot and cold hide. Id like to create both a Ziggurat and a Pyramid but I honestly have no idea what materials I can use to build this that are gecko and heat safe. Can anyone give me some pointers to get started?

 

[DmanXcell]

I have been planning to do the same, and, after some research, I found that most people will use Styrofoam covered in either cement or grouting with a coating of nontoxic paint or cement cover to go over top. I've even heard that sand was added to the cement/grouting to give it a naturalistic texturing. I think I'm going to make a rock wall coming out of the back of the tank my daredevils! I want to make use of vertical space as well as horizontal. The more hides the better, eh?

-Dylan