While doing some testing, I’ve ran into this issue.
I tried every setting I could find to make fog play nicely with these particle effects. I have and need to have height fog/atmospheric fog, preferrably with Volumetrics enabled. I’ve ticked the per pixel and apply fogging settings in the material. It’s transluscent.
I pondered moving over to a volumetric material instead for the clouds but those don’t seem to play well with having individual control over color over many different types of clouds.
Or am I just missing something obvious?