Chunk border seem to behave strangely in this snapshot. Not rendering properly, completely black. Chunk borders only seem to appear when looking in a random but specific direction at a random but specific location. The 4 vertical lines indicating a chunk are offset by a random amount. Chunk borders also seem to dissappear whenever you disable entity hitboxes.
Also seems to drop framerate by some amount. 

Edit: Chunk borders do not show up in the nether at all, and in The End they are still blackened but change back to original colors while the dragon is dying and changes to the end portal animation after the dragon has been defeated.