Weather system in Meranthe?

[Whatever]

I was thinking about this while playing stardew valley. I'm unsure how Eternia could handle it on the BYOND engine and I still remember the fog overlay from Eternia 2 and how it sometimes refused to go away if you left an environment.

This system would only be aesthetically worthwhile if the effort was put into making it such. After custom (and general) props are fully fixed this would be a really immersive experience.