The devs have spent a lot of time revamping the sky and removing things like the stars
https://www.project1999.com/forums/s...d.php?t=183118
For darkness/lighting changes its also noted that stars were removed
https://www.project1999.com/forums/s...d.php?t=336363
Theres also been bug reports where under certain circumstances stars can be seen and should be removed
https://www.project1999.com/forums/s...d.php?t=183118
Are you sure stars in the sky are classic?