Ok, so I went into my Pixel Art World to resume my pixel art, but when I spawned, the place was black and blue (and green). It looks very weird, and I'm not sure if this is a bug or anything.
UPDATE: (It will be fixed once you re-enter the world, though. This just freaked me out a bit.)
UPDATE 2: I thought the bug was fixed once I re-entered the world, but it wasn't. I tried to place blocks and the thing came back.
UPDATE 3: I restarted my Minecraft and the bug seems to be gone.
Intel graphics driver issue, see MC-32606