There is a fun example of using changing environmental effects in the sunny part of the EA main area south of the blighted village, but it’s a bit of a spoiler so I won’t say more if you’re trying to avoid too much info. It does show, though, that it’s possible to have different effects on part of the map, which could presumably also be used for things like night-time adventures in the full release when, eg, dealing with vampires, and different weather patterns, though I can’t think of any other instances in EA.