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My follow up question: How can I use a pivot circle instead of a pivot point

Question

At this moment, I have this: enter image description here

What is the most efficient way to achieve a quad as cut section, where

  • all the faces as well as the unselected vertices are duplicated and overlapping
  • but share the same vertices (selected).

The cut section would look like this: enter image description here

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  • $\begingroup$ Have you tried adding a torus with Minor Segments set to 4, then scale along Z? $\endgroup$ – user27640 Jan 2 '17 at 9:02
  • $\begingroup$ you may try with solidify modifier. You can, within that modifier choose a suitable thickness. $\endgroup$ – MCunha Feb 2 '17 at 14:22
  • $\begingroup$ Would beveling a circle curve - or even a screw modifier - do the trick? $\endgroup$ – John Dvorak Apr 9 '17 at 22:01
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Unless I've severely misunderstood what you're trying to achieve, I still think a torus with Minor Segments set to 4 is the easiest and quickest way.

ShiftA followed by M followed by T or Add -> Mesh -> Torus to add the torus.

Add Torus

After adding it and changing Minor Segments to 4, just scale along Z, S followed by Z, then type in the scale or drag the mouse, and finish with Enter or LMB.

Scaled along Z

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Alternative 1

I tried the following:

  • E to extrude the selected vertices, S and Y and 0 to scale relative to the y-axis
  • Then remove the doubles

Alternative 2

  • First add a plane and rotate it 90 degrees around y-axis and rotate it 45 degrees around x-axis
  • scale along z-axis

It could be a solution to my own question and hence I posted this as an answer to my own question, but perhaps you have a more efficient solution

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