is this possible to change one squares walkable() dynamically?

for instance if someone destroys a wall and now we want character to be able to walk trought it.
or if someone creates a new wall to the world.

at the moment paths cant be changed in game

:(

if it wont be too complicated ill try to add this to the next release (but path changes wont be remembered in savegame)

i only need a temporary solution for this..
something that would be there only a few seconds..

you can create an obstacle that will be there for few seconds or something and
the npc will try to find a different path taking that into account.

Would be awesome if something like this could be possible as soon as possible.