Two Colour(Color) Spiral Cup

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An updated version of the spiral cup for those of you lucky enough to be able to print in <b>stereo 3D!</b> You could print it in red and blue and fill with silver (or white) starts for US based patriotic occasions. see: http://www.thingiverse.com/thing:5014 for stars - scale at 50%. imprint your phone number or a stick a QRCode on the back of each star as a hand out, or fill with star shaped candies/mints. Or maybe print in Silver and Gold... <b><big>Note for "would be" stereo STL generators:</big></b> I originally uploaded the base and top STL files after generating them using OpenSCAD. It quickly occurred to me that I hadn't thought about any overlapping regions between the two STLs. In the original combined STL, any overlapping objects in the scene would automatically become union-ed. But, in a two colour print, these areas would have both materials dispensed. I revised the base STL by subtracting (difference) the top STL from it prior to uploading. so, instead of: <b>pencilCup(true);</b> in one STL and <b>pencilCup(false);</b> in the other. I should have used: <b>pencilCup(true);</b> in one STL and <b>difference() { pencilCup(false); pencilCup(true); } </b> in the other.

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