Removing blue shadows?

[Space Knight]

You have to edit the map's lightning properties in Location -> Light -> [period of time]. I recommend to look at other maps' settings, as an example, and do the same thing for maps on the surface.

Also, don't worry if you're asking too much, I like to answer to these questions, since they probably don't have an answer online anyway (in English), and this will help other people as well. I remember when I had to learn all this stuff without too much info to guide me. You can also take a look in the editor manual.