I've been playing the past couple days on the latest snapshot (14w18b), with 2GB of memory allocated, and after playing for a couple minutes, chunks will be completely invisible until I get really close, or sometimes even until I walk right into the blank spaces where they should be. This didn't used to happen. I have a beefy rig that normally plays minecraft with no issues whatsoever. Any ideas what may be causing the problem?
EDIT: Never mind, I figured it out. For some reason Advanced OpenGL was on. So if you're having this issue, make sure that is turned off.
EDIT: Never mind, I figured it out. For some reason Advanced OpenGL was on. So if you're having this issue, make sure that is turned off.