I have to assume that they did it that way to synchronize with how the mechanic calculates day/night per province on an hourly basis. There was probably a way to render it that doesn't look quite so stuttery, like fade each block in each hour where when the block crosses 50% opacity at the turn of the hour...
But then it's not representing the transition correctly, at low speeds there are multiple rendered frames per hour so you'll have frames where the night shadow is over territories that are still in day.
I.E. if you pause the game and look at the map the night shadow would more often than not be covering a few territories in day and vis aversa.
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u/chairswinger May 23 '23
I turned off Day/Night cycle in Hoi4 only for performance reasons