Preform Item Duplication by dropping an item and pause buffering, then saving and quitting the world when the item is on the ground and in your inventory, in 15w38b WONT duplicate the item, but mess graphic generation up. All Colision is the same before the glitch. A similar glitch occurs in 1.8 where setting render distance to ~15 will glitch graphics, though it will be less flashy. I have never seen this glitch posted ANYWHERE. I've only tested 6 wood, 1 Diamond block, and 6 Diamond Block duplication on 15w58b. NOTE: This glitch can cause seizures, I think. EDIT: Now I have a world with Infinite glitchiness! (Woooo!)
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kumasasa
Broken AMD drivers, see MC-62958
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It's not that, It only happens when I do item duplication or more than 15 render distance, but item duplication is the worst. It only happens on those two.
kumasasa
Please redo that screenshot with debug-info enabled.
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Finally got around to do it.
kumasasa
Again, you're running broken and outdated AMD Catalyst 12.10 (from October 2012).
Current non-broken version is Catalyst 15.7. See MC-62958 or go to http://support.amd.com/en-us/download
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Thank you for more detailed info and how to remove the glitch.