Monsters can become permanently blind (in very narrow circumstances -- I think limited only to a very short-range camera flash), in which case they have both mon->mblinded and mon->mcansee set to 0. Such permanently blinded monsters can counterintuitively regain their sight by being blinded a second time from a different source: for example, by being hit with a cream pie. That second blinding will increase mon->mblinded (which functions as a blindness timeout) by some amount, and when it runs out the monster will regain its sight. Try to make sure that doesn't happen by skipping any blinding attacks if the monster has already been permanently blinded.
11 KiB
11 KiB