EDIT: Oh, I’m so stupid! Thank you to the person who came up with the World Editor Tools guides. It turns out I just need to hold shift to reverse the No Pathing Tool.
I recently started experimenting with modding in Grim Dawn and tested out the No Pathing brush. However, I discovered that the impassable terrain and invisible terrain settings seem to be irreversible (at least from what I can tell).
Does anyone know how to undo or fix this?
Thanks, and apologies for the stupid question!