There is a render glitch that happens from "Point Estimate: X500 Z500" to "Point Estimate: X-500 Z-500". It makes a super glitchy bug, that makes it unbearable to play in Minecraft. See all attachments for more details.

To reproduce:
WARNING: If you have problems with rapidly flashing lights, don't try to reproduce.
1. Switch to a lover render distance under 16/32
2. Have it on there for a bit.
3. (To help with reproducing, try producing lag, or switch to another world) Switch to any render higher then what you set it as.
If done correctly, you should have a super glitched render.