Right now it doesn’t (but who knows what @robgrz is up to ! 
)
bCNC has this feature.
Or you reach out to @fenrus and kindly ask if he would share the standalone software he wrote to do this, as described in this thread, and then in combination with his other tools to modulate g-code based on a heighmap, you would get similar results (and then you can still use Carbide Motion, since all the work has been done offline).
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