[Redwine]

You need to unpack the textures into the enviromental and sky fiiles, then you can modify them to have a more clear sky and sea surface at night, the textures has many squares, each square is corresponding to a determined day hour, the nigh one is if i dont remember bad, the top left corner one, you will quickly recognize it because it is the most dark.

After modifications, you can repack the textures and make tests, up to you become satisfied.

Plus.... the clouds textures are the main responsible for the dark nights. The cloud textures cause the dark nights.

You can try to change your cloud textures for another non too dense.

Nothing you do on the textures, will help you on a stormy night, storm cloud textrues are very dense and produce a "pitch black" night.

But under non dense clouds, or into a very clear night with no clouds, to modify the sea surface and sky textures helps you to have a more clear background and to see the silouette of the ships due to the increased contrast.