How do i make fake rock
Pammy: maybe this will help
Not sure how big you want or what the use is, but I would save the Styrofoam that comes with packing or see if you can get some at UPS store. Paint with gray, brown, black and white in dabbing pattern all over.
How much are you wanting to make, what are you wanting to do with it, and where are you hoping to put it?
Please tell us a little more about your project.