Hello,
my very first mod here, coincidentally to a game I worked on
http://www.subsim.com/radioroom/down...o=file&id=5231
it's goal is to reduce the underwater visibility in Cold Waters to values similar to those in Atlantic Fleet but also to slightly -very slightly I must say- differ depending on time of day and sky state
that said it isn't a "weather modification", oh no, it is simple increase of underwater "fog" to reduce visibility and player's chances to spot vessels or torpedoes at further ranges; also I have not toyed with the colour of underwater scenes, works good for me as it is
also this mod serves as simple example of basic modding of Cold Waters StreamingAssets files
Enjoy!