Need help chaning the skybox in MainMenu's model [SOLVED]

[Blahblah_Blagar]

Hi. I'm trying to make a custom campaign screen for my project based on the RoC's main menu. I have very little experience with model editing and so I came here asking for some little help with a single issue I currently have. I want to change the model's skybox into someting more daylike, but apparently it's not a texture and I can't find anyplace where I could change that... Segment's (?) colors. Any ideas how to fix this? Maybe importing in an actual skybox, but even then I would need a step by step guide for that

 

[Blahblah_Blagar]

Done. The lighting is off, but It kind of gives the model a "bright day" atmosphere. Very simplistic, but kinda neat, isn't it?

It's coming together quite nicely, does anyone here know how to fix the lighting, though?