Wonderful addition! This will improve concept sculpting a whole lot. I'm all for committing this to master

I'm all for this addition, but I feel like the depth could be visualized better so there's less guesswork - similar to the cursor for the layer brush

Been trying to figure out the tool for awhile now. My brain translated "Cursor" to mean "3D Cursor". I assumed, like the grease pencil tool, the 3D cursor was somehow affecting it's depth, but obviously was not having any luck with that.
I finally realised my misunderstanding (with help from a 3rd party), that the tip is referring to the *painting cursor*.
However, my confusion remained, as I was still thinking in terms of position.
(yes, yes, I know... silly me, but hopefully the train of thought makes sense of my confusion)

Recommend changing the wording.

Instead of:

Use Cursor as Depth

Perhaps:

Cursor Size as Depth

or

Cursor Radius as Depth