If I recall correctly, Legions never got along well with integrated graphics cards. If messing with the editor's view distance doesn't help, it will likely stay that way unless the devs know what's going on.
I thought of something new to see what causes it.
1. Create map from Frostbyte or any other map and look at that map, every corner, everything.
2. I see nothing changed so I go ahead and "save as"
3. Go to my missions folder and lets say that I wanted to make the map bigger from "8", lets say I increase the size to "10" or "12"
4. I click save, and add the map to my config file
5. Update launcher and load map
6. Thats when I see the box like things
My thought is that this only happens when I change the size of the map. I tried this out on the desktop we have and it sometimes does this but like every once in a blue moon.
I also tried it out on my brother's laptop and I get same result I get on mine.
Does this happen when you do it too or no? or anyone else?