I have a bug with the weatherpack.
In quick drives try setting the season to summer, weather to fog and the time to 17:00
On my system the sky is blacker than black with this setting.
Another bug is that snow defaults to the old TS snow at 17:00 too.
I’ve tested it on München Garmisch. München Rosenheim. Mosel Valley. Tirol. Arlbergbahn.