So this used to be a bug in 1.6 or 1.7, and what fixed the glitched black lines was the view distance. but in 1.8.1 this has no effect....it is frustrating since i'm trying to start on youtube and this is a distraction and looks bad.. rruins the fun in the game. I have looked over the internet and really havent found much, usually of older version of MC not 1.8.1. HELP PLEASE

Fix: https://bugs.mojang.com/browse/MC-1794

What worked for me is to turn off (MipMapping)