Simplest/Most Efficient Stone Generators 1.11/1.12

new stone generator concept based on observer feature to detect state changes of lava blocks.

broken in 1.13

I also show concepts for generator arrays.
NEW WORLD DOWNLOAD HAS FIX FOR ISSUES WITH STONE GENERATOR ARRAY: http://imgur.com/a/C8zLm
world download:
https://www.mediafire.com/?4fxu61ka1c...

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