Thanks for the info. However I need a way to not spawn a normal “floor” marker based ceiling over the stairs - otherwise I cant walk up or down them unless the cell height is set to at least twice the character height (which makes for dungeons with unrealistically high ceilings). Basically I want a dungeon with a cell size of 400x400x150 (or 300x300x150) that has ceilings and stairs. Any way to do this?