There are many 3d printable dungeon wall sets. Some might say too many. So why make another? Simple, these walls are all based on a traditional square floor map model. I like hexes and the use of character facing. But how do your get that to work with straight walls. A 2d printed floor laying on a thin piece of steel. Then the wall pieces all have small magnet pressed in the bottom.   (There is also a version with a doorway)