Unnecessary green/red/blue lines

I just got done with my house and I am currently texturing it. But I can barely see some of my textures because of these blue/red/green lines. I don’t know how to remove them and need help.

Styles > Edit > Color > All same

Thank you.

Do you happen to be Swedish? This looks like a very typical Swedish 1970s house.

Lithuanian too :slight_smile: