Clicked off target by accident while standing in a doorway, adjacent to R door hinge. Breath went off visible map and for atleast 1 "count" of the spell (progresses incrementally) the room in front of me that I could see had its floor textures (panel graphics) change. Replicated this after a couple attempts afterwards. Change: I mean the array of floor tiles changed for about 1 count of the spell. During the two times it happened I was unable to notice anything that might give any help as the tiles changed. No indicators. Only replicated it once after about a dozen tries. I'm out of drink. Not sure if it perhaps re-simulated the door being opened for first time giving (if generated at that time) a new set of floor general tiles.