Its only certain chunks, mostly around the facility, and no not on any other maps... Ill try reinstalling the launcher now
EDIT: Sadly it didn't work..It probably is my computer because if i try playing my regular tekkit/technic world, I have to have the render distance on tiny and a lot of things off like clouds sun/stars etc. I have a Windows 7 Home Premium if you wanted to know..Thanks for trying to help though. It is probably one of the best maps I have ever seen made!