You fill the holes back up?
Bugger that!
Yeah, not so much OCD but kinda used to playing Cities Skylines and using the landscape tool in that game to smooth the terrain out. I now realise that it has tiddly squat relevance in this one, thankfully....!
Still I did do a much better job using the "round" beam on that tool to fill the holes in than our local council seem to do with potholes on the roads.