I did not care about being compatible with other tiles. I just tries to make these as versatile as possible. Plan is to build the dungeon as adventurers enter a door/opening. Taking the tiles from already visited places and creating new places from those.. All tiles use 5mm ball magnets (8 on the floor, 4-5 on the walls/doors/windows). Balls can be pushed to their "nests". If too tight then use 4,5mm drill to enlarge the holes.

WALLS: Ball magnets also on the middle of the side. Ball has 7mm tolerance to move up and down so, that walls on the floor or beside the floor get magnets connected.

FLOOR: ball magnets in the every corner and the middle of the sides. Floors are as thinner than original in order to maximize the magnet connections.