Hey, i'm running fx 8350 CPU with a radeon r9 390. And i'm using optifine 1.10.2 HD_U_D2
I get this glitch where there's a huge black dot in the middle of the green with a white ring around it which gets bigger or smaller depending on where I look. The ground also changes from light to dark when I look at the sun and away again. It also says gbuffers_terrain is an invalid program.
I recorded a quick video to show you whats happening hopefully it helps. BTW the FPS when not recording stays around 59-61 FPS.
https://www.youtube.com/watch?v=tRuMpJzCynk&feature=youtu.be