Fog does not work correctly with the alexscaves-1.0.4 mod

ColdSweat-2.2.2

citadel-2.4.5-1.20.1
1.20.1-forge-47.2.1

unfortunately not fixed but, if you set the Heatstroke fog value to false in the main config it will solve the problem.

I think disabling the setting is your best bet. Both mods mess with the fog, and I guess Alex's Caves just wins out. Or maybe you can disable it on their end, I don't know.