Making second levels:
Referring to the picture below, you "carve" a trench of shape 161's
into your map, two wide, separating the "lower" area from the
"upper" area, this trench will be covered by wall tiles, so no biggie
on the looks at this point. And as you can see from the couple of walls I put
in, they do cover that 2 wide trench. The colored tiles are there for when you
reach the DS below the image. Otherwise, make it all 161, the purpose is to
prevent people from moving into the area behind the wall.
(0:7) When somebody moves into position (50,37),
(The YELLOW tile)
(5:14) move the triggering furre to (50,33)
if there's nobody already there. (The GREEN tile)
(0:7) When somebody moves into position (48,34),
(The PURPLE tile)
(5:14) move the triggering furre to (48,38)
if there's nobody already there. (The RED tile, under the steps)
One
can also do this with the tall walls and the two piece stairs, however it takes
some extra precautions to make it work, mainly you have to prevent furre's from
walking into the yellow position for it now lies outside the wall. One means is
to place something non-walkable there, and to either side, for the above DS
checks that someone moved INTO that position, just making that sole yellow spot
unwalkable won't cut it. The other method involves adding one line of DS to the
part which takes you from the lower floor to the upper floor: "(1:19) and they (moved from/are standing at) position (48,38), (The RED tile)" and that checks
for direction of the move, so people can then walk UNDER the stairs, and not go
anywhere. Of course, people can walk into the upper stairs from the side still,
but I leave that cosmetic problem up to your weaving skills. 