Volumetric Light - How to increase resolution?

Hi

As you can see the volumetric light has very low resolution. Is there a way to increase it?
The emitting light is a moveable spotlight. I have exponential height fog.
Version 4.16.1

Thanks.

You can either crank up the general engine scalability settings or lower the gridpixelsize via the cvar.

Thanks! It worked.
I chose to change the grid size through the console. Cinematic settings were causing low Fps.