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At its simplest it's like twirling a napkin or piece of paper from the center where alternate edges rise.

If a picture's worth 1000 words, this kind of effect:

enter image description here

There's already a flat spiral example here:

How can I make a flat, spiralled surface?

As I'm envisioning it, for example, the red twirls would be raised.

I've seen comparable examples on cylinders, but not on surfaces (square or circular) - like a pleated dress for example, or a curly cone, but not a flat surface.

Is that enough info?

Tried simple deform and proportional editing, but I keep missing the mark. Maybe they're key to the result or not.

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2 Answers 2

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At its simplest, this is a selection problem.

  • Create mesh Circle, 'Triangle-Fan', with an even number of segments, in XY.
  • Select the central vertex, and CtrlShiftB - drag Bevel it, to make all faces quads.
  • CtrlR cut in some subdivisions of the radial edges, as below.

enter image description here

  • Using O, Proportional Editing, select the central face, and RZ rotate it, which should drag all the other vertices in the radius of your prop. edit into a spiral.
  • Select 2 sections of radial edges, in the same ring, 1 edge apart, as just visible in the central image, below.
  • CtrlShiftNumpad + Select Next Active, to select every other radial edge in 1 ring.
  • Header Menu > Select > Select Loops > Select Edge Loops to select every other radial edge, as show in the last picture, below.

enter image description here

Now you can GZ, RZ.. raise, tuck the pleats.

enter image description here

If you wanted to, using a similar selection method to the one used for the spokes, you could select every other edge-ring, to delete those. Or, think ahead, and delete them before all the twisting, etc.

The finished example, here, has a Solidify and Bevel modifier.

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  • $\begingroup$ "Select 2 spoke sections at the same radius, 1 spoke apart" is confusing to me, please clarify. $\endgroup$
    – unkerjay
    Commented Jul 31, 2021 at 15:47
  • $\begingroup$ This method works with the example, but, doesn't seem to work as well with a less circular shape like a square, polygon, or hexagon. I know that's not what I asked for. $\endgroup$
    – unkerjay
    Commented Jul 31, 2021 at 15:55
  • $\begingroup$ Ctrl-Shift-B doesn't seem to work for me. I must be doing something wrong. I get a gloopy mess. Doesn't matter whether I choose percent, width, offset, any of the options - same result. $\endgroup$
    – unkerjay
    Commented Jul 31, 2021 at 16:02
  • $\begingroup$ Found this that helped with "Ctrl-Shift-B: blender.stackexchange.com/questions/39512/… $\endgroup$
    – unkerjay
    Commented Jul 31, 2021 at 16:27
  • $\begingroup$ Under O rotate the central face is also confusing. There's no explicit "rotate the central face" option. $\endgroup$
    – unkerjay
    Commented Jul 31, 2021 at 16:36
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I would try it like this: enter image description here

create a circle, use twice as many points you will need and then press F3 and find "checker" use this option, it will deselect every second vert

enter image description here

Then you can use E and S to extrude it to middle

enter image description here

Next you want to subdivide your edges as much as possible

Now use proportional editing , select middle vertices and rotate it around Z axis to make spiral: enter image description here

enter image description here

and now you want to Extrude all vertices you want to be solid like in picture, extrude with E and rotate around Z axis till you get your shape... After that it is only about rotating and moving vertices... I ended up with this and I think it is usable:

enter image description here

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    $\begingroup$ Yours is easier to follow and I think, simple, but Robin's is closer to spot on to the example. $\endgroup$
    – unkerjay
    Commented Jul 31, 2021 at 15:38

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