There are four color schemes. Except in the Moonless scheme the opaque horizon has a too violent color which is not adjustable. A wish : the opaque horizon should not be completely opaque.
What is 'too violent' color? You do not have to choose any predefined color scheme, just define your own.
Created attachment 106909 [details] Violent
I am not sure my comment went through. The reason why the opaque horizon should not be completely opaque is when we change the time forward it's nice to see what constellations will pop out of the horizon
(In reply to Jasem Mutlaq from comment #1) > What is 'too violent' color? You do not have to choose any predefined color > scheme, just define your own. I couldn't find anywhere how to change the opaque ground color. It is always bright green. And opaque.
Settings --> Configure KStars --> Colors
As per discussion, this is not a bug. The Horizon color can be configured in the Settings.