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I have a sphere and I want to make some cylindrical cavities on it's surface, which are tangent to the sphere's surface The cylinders wich which I should make the boolean difference should be disposed as a sea urchin, i suppose: with the bottom faces of the cylinders being on the same origin and the top faces spreading out radially.

Here are some images to give a better idea of what I should do:

This is a "flattened" version of what I want to acieve enter image description here

How do I do the same thing on a sphere?

I need to get to the point where i get something like this but with the cylinders going all around the sphere orbiting around its Z-axis

enter image description here

Thanks in advance :D

Edit: Is there a versatile way of doing so on objects which have an elliptical/irregular shape?

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marked as duplicate by Chebhou, iKlsR Apr 26 '15 at 15:24

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  • $\begingroup$ Thanks @zeffii , is there a more general approach towards a non spherical/round object? What if the sphere were "squashed" on one axis and I wanted the cylinders to rotate around that axis (therefore performing an elliptical revolution)? $\endgroup$ – torels Apr 26 '15 at 14:38
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    $\begingroup$ Yeah, you might use Duplifaces, but that becomes a different Question entirely, with different approaches. $\endgroup$ – zeffii Apr 26 '15 at 15:04
  • $\begingroup$ k, posting a new question then, thanks :) $\endgroup$ – torels Apr 26 '15 at 15:12

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