Hm, not sure the backside is going to be useful.

A ladder (an exit) is layer 5, so will always be underneath/behind the player (when both are on the same square). Or another way to look at it, ladders will only look sensible on the north, northeast, or northwest side of a square.

I think if I (as usual) just flip the first two, so we have a 131 and a 151 of both, that'll work. Thanks.