Mining the floor or ceiling of a cave does not create tunnels. Instead, it raises (for ceiling) or lowers (for floors) the cave. Note that as with [[digging]], these actions affect the closest corner of the tile, and not the tile itself. A ceiling tile can be mined upward around 31 times before it is too high to reach. A floor tile can be mined downward a maximum of ?? times. Excavating a new tile from a tile that has raised ceiling or lowered floor does not open at those levels. The new tile will be standard height with the the ceiling and floor sloping as appropriate.
Please Also note that when mining the floor you can create uneven serfacessurfaces. Making it hard to move around in your mine. I would suggest mining streightstraight, Left, right, up or down, don't combine say up and down in one tile, as it will make the floor and next tile all weird. Instead mine down and keep mining down till that tile is removed.
== Cave-ins ==