Wow, thanks Connie! That's quite a complement.
Judy, re: beeswax, I have a pre-mixed jar of wax paste I had made of melted white beeswax and turpentine (1:3). I scooped out a small amount and mixed it into my paint. It turns the paint into a thick clay-like paste which I applied with a paint knife for the rock background. It's not on there all that thick, however - not any thicker than undiluted paint. I added a bit of emulsion to it to be able to smooth it out with a brush in places. The emulsion also helps harden the wax more.
Here's a closeup of the right corner.