When at FOV 75+, blocks at the edge of the screen, presumably to reduce lag, turn invisible and you can see caves through it.
Example was too big for attachment, here's a video link:
https://www.youtube.com/watch?v=lvrBvhl7nsM
Environment
Java Version: 8, Update 5
GPU: Radeon HD 7770
CPU: AMD FX-4350
Linked issues
Attachments
Comments 2
Marking as duplicate of MC-63020 due to issue split.
Attached example gif.