Thanks. I'll give that a try. Even if there is nothing there at any of these locations, a character should be able to traverse the terrain. 90% of the map has nothing to see on it, but a character can still walk there, so why should these places be any different? :unsure:
The stated reason for the walls is to break up the terrain for the NPC AI; To simplify and manage 'pathing'.
Oddly... My main problem with them hasn't been the interior walls, but inadvertently straying outside of the exterior "invisible walls", and getting blocked from re-entry somewhere else; and not knowing where to return to.