(gankoa) At least Atlantis home 10, interior is missing some walls.
The crepes on the left mark where north/south walls aren't visible.
The crepes on the right mark where north walls aren't visible.
But those places are blocked and can't moved onto.
(Sorry not better idea how to show as the mini map isn't on the screenshot and giving all the x/y positions of the 17 missing (invisible) tiles is rather cumbersome.
PS: I'm pretty sure I remember that other houses in Atlantis are also missing walls.
Either one should check them all in the editor or add them here as comments when finding missing spots in another house.
Anonymous
(gankona) Same in Atlantis home 14, interior
Not sure whether behind the broom on the left side and the oven there should also be a wall edge (with the brighter edge.
(gankona) Also in Atlantis home 7, interior
As usual, the missing parts are above/below the crepes.