Oh thank Heavens! I might have to give it a shot then when I get back to port. The clouds look really good in FotRSU, but I'd like to see these as well!
Edit:
Link the the thread:
http://www.subsim.com/radioroom/showthread.php?t=207786
It appears that this is just an eye candy mod, so it does not affect AI sensors. I'll really need to give this a shot, though I am a bit worried about the "fog" part. In my opinion some people put entirety to much fog into their environment packs. I'm no sailor, but the times I have been on the Ocean, I've never seen even a hint of "fog".