Moving fast, be it in Conquer the Skies or vanilla, causes the edges of the screen to become black. Having no water outside just leads to people moving really fast and so this issue becomes more noticeable in regular gameplay.

I could try to fix this bug regardless, but keep in mind it's not an issue with the mod itself.

ah, makes sense, never had it until i got conquer the skies though. maybe its with performance fix?

I don't run performance fix and I get the edges of the screen turning black, although it's not very noticeable and rather minor.

Maybe performance fix makes it worse, maybe it doesn't. Feel free to test it on your machine.

yeah, i tested it. the screen tearing really never happens to me until im in the great sky, and its only with the background. does the background use a loading system where if its near you it gets loaded?