Foggy

"Volem_Fog" was applied. However, as for this, attenuation of density is linear, and it does not react to the flow of air. The flexibility of "Particle" may be higher.

Although the refractive index of sea water was 1.339, I processed this as 1.3. In our eye, the difference could not be distinguished, since the refractive index of fresh water is 1.333.  

Volume_Fogを使用。直線的な減衰で、しかも当然のことながら空気の流れには反応しない。Particleで対応した方が自由度は高そう。
ちなみに海水の屈折率は1.339だが、1.3で処理。真水は1.333だから、人間の肉眼では判別付かないレベル。