1.12.2 Mostly problem . I use Amd radeon 7840 video card, and amd A8 3820 processor , The essence of the bug is that when playing with a level 4 mip map, my textures look fine, but 10 minutes after the game starts, they go bad. anti-aliasing of distant blocks is corrupted, it can be seen from the link below, 6 months ago it wasn’t like that, if you need to provide absolutely all the information (clues) that I found about everything, it’s not so small.
https://imgur.com/5X1DjVZ
https://imgur.com/a/vcQnZBn
(1st pict is good, 2 no)
Also it breakrs on 1.7.10 but rare and fixes easy with changing 3 level to 4 and 4 to 3 (30 seconds process)
Yaroslav#8528 discord , if you have any info you can write , its will faster
Windows 10 , 64 bit 8 gb ram , allocated 5.120 MB Arguments : xms 256 M xmx 5120
Forge : Latest
Java 8 64bit 261