Flying over giant ice sheets (Ice, not packed ice) with water underneath them will occasionally cause them to start rendering strangely on a chunk-by-chunk basis. Flying too close to any chunk in which the rendering has broken will fix it for that chunk.
Continuing to fly in the same direction once the bug has started to occur will cause more and more chunks to visibly glitch.
Steps to reproduce...
Create a new Superflat world in creative mode
Set the preset to
3;minecraft:bedrock,20*minecraft:water,minecraft:ice;10Enter the game
Start flying around and looking around until the endless sheet of ice starts rendering strangely (Check screenshots for examples)
Environment
Environment details...
Windows 10 Pro
Java 1.8.0_121 64-bit
CPU: Intel i7-4790K
GPU: NVidia GTX 980 (PCIe/SSE2)
GPU Drivers: 4.5.0 NVidia 381.65
16.0 GB of RAM
686 / 3046 MB of RAM allocated at the time the bug occurred
Two 1920x1080 144Hz monitors, Minecraft is running on one of them
In-game video options...
FOV of 90 degrees
Fancy graphics
24 chunk render distance
Maximum smooth lighting
150 FPS cap
No 3D anaglyph
No view bobbing
GUI scale at Large
Brightness +20%
Fancy clouds
All particles
No fullscreen
VSync on
4 MipMap levels
VBOs on
Entity shadows on
Confirmed in 1.11.2 and 17w14a