I just copied every premade hex wall and set the meshes of the copies to hidden in game. Then I placed one of them at each way that I want to be impassable and afterwards put a wall mesh right over them. So I can walk on every field but can’t cross the directions in which the invisible walls are.
Right now I have a problem with getting my doors to work with the new version. Up until now I got ‘all actors of type’ ‘grid manager’, got position 0 and with that casted to the grid manager to get the ‘edge array’ and change it. Redoing this with the new grid manager instead of the old one or the grid manager hex child (since i’m using hex tiles) doesn’t work. Same when I get all actors of type game mode and cast to the grid manager/hex child via game mode. The cast to the grid manager/hex child just fails and I don’t know why 
Maybe you can help? Thx!