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This shape has the same crosslike fractal faces and hexagonal snowflake profile as "Koch Snowflake solid", but also has perfect "Koch snowflake"-profile holes running through it. Which makes it much cooler than its close relative. It's a Sponge!
The shape has well over a hundred thousand faces, and has to be this size to work wih the WSF minimum wall thickness. I'll soon be producing an alternative version intended for the newer hi-res Shapeways materials -- that version will be smaller and cheaper.