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This ring was generated with the StructureSynth tool, tidied in Blender and checked with accutrans and meshlab
The outer blocky part was generated with a recursive script and then tidied manally with blender. There were over 10000 cubes in the original output, so they were obviously thinned down. There were also a number of non-connected blocks that have been removed too. The design hasnt been edited in any other way than that.