The area that was flashing should have consistently rendered.

the area flashed seeming randomly

I'm not sure how to reproduce this bug, but I am pretty certain that this is enough information.
Seed: 7577467982800227193
I was in creative mode and flying
The only last detail to fully reproducing the bug would be a redstone torch under the block behind the sheep, as shown in the world file.
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this does not appear to be related to the world, as the same (or very similar) glitch showed up on multiplayer, albeit modded multiplayer, it was a vanilla client.
See screenshots after 2014-11-10_15.44.06.png for multiplayer instance and video settings

Environment:
System.getProperty('os.name') == 'Windows 8.1'
System.getProperty('os.version') == '6.3'
System.getProperty('os.arch') == 'amd64'
System.getProperty('java.version') == '1.8.0_25'
System.getProperty('java.vendor') == 'Oracle Corporation'
System.getProperty('sun.arch.data.model') == '64'
(From minecraft launcher startup screen)
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found a piston, torch, and dust setup that makes places flash
see screenshots