There's swamp under wall
-
When I use .lookAt() function on wall, sometimes it returns 1 object, sometimes 2 objects. One of them always is wall, but sometimes there's also an invisible swamp sometimes. In UI it is not detectable.
I think that for consistency it always should have either plain or swamp, or neither of them under wall.
-
Can confirm - seen it myself - one of these odd squares with swamp and wall is located in E6N3 - either 23,37 or 23 36, don't remember which one.