I have ambient in my worldspawn and it is 28 (i saw it on the Pande Jkg tatooine map... it is 28 for nicer look) . But there is a reason of it. I dont know @Asgarath83 that changing ambient would eleminate this bug :/ It is strange that compiling doesnt show anything it just ... creates map this way. And sometimes not using ambient is great! My carbonite map has no ambient spawnflag But this is only good when You rly want to make atmosphere places. The ambient is rly helpful in the outdoors to make the shadows still visible and rooms which has very big amount of not strong light sources Still many thanks for answer