I also been able to reproduce it
[media]I've created three new worlds in 1.14-pre 2 (two normal and one amplified) and I've invested several minutes flying over each one, and I've not been able to find any black patch related to the lighting, so it seems to be fixed for me = D
@Georgii Gavrichev simply create new amplified world and fly around
Still happening in newly generated worlds.
[media]I don't think it's MC-142134, because I didn't have any light sources like torches, beacons or lanterns near the black patches.
Sure that fixed?
[media]
Not are "random files", as documented on the game wiki, the folder DIM-1\region contains all region files for the nether. I wanted delete them to re-create the nether dimesion in an old world to have all 1.16 features without flying away.
[media]Source: https://minecraft.gamepedia.com/Java_Edition_level_format