I’ve been redoing my scaping to open it up a bit and get some negative space as well. At the beginning I just stacked rock and the realized I hated it. Now I have only a few pieces still stacked and one is a big boulder. I was thinking of breaking it up and using acrylic rods to make some sort of arch? I attached a picture. The rock on the right is the big one I want to break up and maybe attach to the rock on the left. Any suggestions would be welcomed!