I have a water volume looking like that. I want to add a fog under the water. At first, I tried to make a post-process fog but this is a bad solution due to unreal having volumetric fog already. I created volumetric material and applied it to a particle system and now I can’t make particles appear strictly inside this box. I don’t want particles to show up on the water and block vision completely. Maybe the forum can help me with setting up such a particle system? I also want the ability to scale my water volume and have the fog adapt to that. It appears that initial location modules don’t scale with the parent component.