Thanks

The weather c821e clouds will be implemented to the rain weather types, they use the same cloud texture as far as I can remember now.
Then for the actual fog weathers I will use only none tiled cloud textures that has a very subtle definition from the the sky as it should be in a foggy weather, most of them at least.
So the sky color plus none tiled textures will be used for the fog weathers, more or less like a sheet.
Or I will use a texture with solid color as a cloud background so it covers the sky color and then place in some small cloud formations here and there.
But that is for the Weather Addition, in the ELE - Weathers module I will use the same placement of the clouds as vanilla to make it more compatible.