so … you can do this as long as you also have the gcode that cuts that dome…
I wrote a (browser based) tool to then “modulate” one set of gcode on top of the other (the base) … let me know if that’s what you have since I’ll need to then explain the pieces – I spend most of the time on the math behind this, not on making it a easy to use GUI 
Topographic inlay ← example of this in action where I put an inlay (which is just a fancy advanced v-carve) into a terrain carve