Exponential Height Fog with Spot light Pixelated

Thanks a lot . I was as well thinking about the fog ‘quality’ or ‘resolution’ to be the issue instead of any lighting parameter, while not having any fog parameter to change in the editor (I mean settings to adjust on the actor).
I’m gonna have a look at this using this command.
I know this is going to be ressource expensive… Waiting to test the raytracing on unreal soo, and the way it can manage volumetric lights.
regards