From start of word creation fog will rise. Almost all life struggles to survive it. Take this as race of time, will it overcome you or will you thieve in aftermath.
In any case, it not beginner friendly mod by design, in configs you could increase time when fog kicks in and that it.
Will change your world, make backups before use in world you care for.
There is fog that rises from day 0 to a height 100. It suffocates mobs and players, prevents spawning for mobs that is not whitelisted. Flora is dying out(leafs, crops, flowers breaks), open fire extinguish, lava solidify.
Lot of thing exposed in config for tweaks.
Recommended experience with Create and Create Aeronautics
Inspired by BananaMan's - Rising Toxicity
The Fogged Team
