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I am trying to create the 'pumpkin creases' like it displays in my poorly created image. I can't explain it with words but it looks like magnetic fields? It is also the reason I am posting a question because I simply can't find the right words for describing this. I need it as shader of course. So the 'texture' from top would look like outgrowing spikes or lines from center.

poor image

https://i.imgur.com/9cgI20e.mp4 -- somewhat visual representation of how the lines grow along the planes and towards the ends of the lines.

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  • $\begingroup$ Is it supposed to be done from a cube? or a sphere? $\endgroup$ – lemon Oct 11 '20 at 8:44
  • $\begingroup$ this should be procedural independent of the objects shape $\endgroup$ – Michael Stevens Oct 11 '20 at 9:08
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Not totally sure this is what you expect.

enter image description here

Though, from object "texture coordinates" you can take x and y value so that "arctan2" math node gives you the angle around z axis (between -pi and pi).

Then use this multiplied angle with a sinus (a value between -1 and 1) and plug it as displacement height.

The sphere has some subdivision thanks to subdivision modifier.

Also, the material settings (using Cycles) has a displacement set to "displacement and bump" or "displacement only".

enter image description here

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