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enter image description here

Does anyone know how I could make a similar "stripes/swirl" model (the orange one around the yellow ball) like in the picture? I've been thinking about making several spirals, but it wouldn't be as irregular as in the picture.

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I was able to get pretty close procedurally, I started with an emissive center sphere with another sphere scaled up slightly.

enter image description here

I'm using a voronoi texture into a color ramp set to constant so that we get a hard cutoff. We'll feed this output into the alpha input of the principled shader to punch holes in the mesh. You can experiment with different types of noise here.

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The rest of the manipulation will happen with the coordinate space.

We're rotating the coordinate space along the z axis, scaling it quite a lot, and then feeding it into the voronoi texture. With the right gradient you should be able to rotate more as you get closer to the center.

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If you don't care whether a seam is present, we can abuse the UV sphere's premade UV map and get much closer to your reference very easily. We can move the texture over in the X direction as we go from top to bottom.

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There's a much better convergence at the top, here, but there is a seam present on one side.

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The equivalent of this node group is going into the UV editor with proportional edit set to linear and moving the top row of verts along X.

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Lastly, to capture the bumpy nature of the reference, we can add a couple of subdivisions to our outer mesh and use displacement. Cycles only, and you must set your material displacement settings to either Displacement or Displacement and Bump. Example 1 enter image description here

Example 2 enter image description here

Example 3, using undistorted texture coordinates enter image description here

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    $\begingroup$ ... I don't want to tread on your very nice answer.. would it be possible to take it a little bit further still, by using the Voronoi, before threshold, as a displacement? To generate the little bumps on the surface? (OP refers to a 'model'). Ignore this, if it opens a can of worms.... $\endgroup$
    – Robin Betts ♦
    Commented Nov 20, 2020 at 8:49
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    $\begingroup$ Thank you so much for your answer. Could you just tell me what exactly are the "curved traits" ? Is that just a texture or a solid from blender ? $\endgroup$
    – Zuraax
    Commented Nov 20, 2020 at 15:19
  • $\begingroup$ I'll add a couple things to this answer to make it more clear regarding both of your comments. $\endgroup$
    – Allen Simpson
    Commented Nov 20, 2020 at 17:38

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