Hammered wedding band

This kind of hammered look

is something I used to do in wax or direct to metal. I know others have used the " *Heightfield" command to do this. I’ve been trying, unsuccessfully, to do it with “Displacement” after watching Brian James video ( https://www.youtube.com/watch?v=8zcl6zccz9o ) as a better way. Might there be a better way to accomplish something so fractal with more control then Heightfield? Maybe with Grasshopper? If yes, can someone point me to the right components?

This isn’t playing to Rhino’s strengths, so I guess the question is “Why do you want to do it in Rhino?” FWIW Zbrush or 3dcoat, for example, would be better tools for this.