1 Set server render draw and item distance to 4km
2 Set player render and item distance to 4km
3 Spawn on the coast
4 Set weather to clear skies, no fog/haze, no rain
5 Observe the constant haze.
6 Teleport and/or use a camera mode to move/fly inland
7 Notice the haze dissipates the further you move inland
8 This haze exists regardless of weather or time of day
-> Consider the remedy I noted above to make haze only an pre-daw/early-morning effect based on weather (i.e. not every day).