I followed this video to get an understanding about how to make a fog through making a custom material, then adding that material to a custom particle system. Everything is set up correct i believe but nothing is showing. Any help?
Did you enable VolumetricFog on your ExponentialHeightFog?
I’m using a particle system in my world. It doesnt have a exponential height fog.
Place a ExponentialHeightFog and enable VolumetricFog 
The exponential height fog doesn’t effect my map but I think that would be a question for another day.
Did you try to place an ExponentialHeightFog in your map, select it, and inside the DetailsPanel select VolumetricFog?
yep and nothing happened although i did make a fog out of a niagara system that’s seems to be working well
Then it could be possible that you are too far away from your local fog.
LocalFog.zip (801.9 KB)
Here is a working example.
Hello!
Your main light (directional) sould be “Atmosphere sun light” and have “Cast Volumetric shadows” activated, as the “volumetric scattering intensity” should be greater than 0
Hope this helps!