would like the look to be somewhat like this...
How to make a decorative river rock wall
Looking to DIY a rock look on a wall. Would like to find something I can sculpt my own rocks with. I have been told cement would be to heavy on a drywall backing. Does anyone know of a lightweight sculptable product I could make individual stones then apply them with mortar or even if mortar itself would work in the sculpting process. I don't need to make them very thick but would lick to make some of them at least 12 inches wide. On a limited budget of course.