ToME: the Tales of Maj'Eyal

At a game jam, trying to get my NPCs to change their tile image under certain circumstances. Just changing self.image = "blah.png" doesn't do the trick. Anyone know how to get the image to update?

Well, let's see, in ToME the Pheonix unique changes its image, let's go pillage that...

After changing the image, run

That worked, thanks :)