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Particle hair seem to have a weird behavior. Following image shows my guides:

enter image description here

And here is the render:

enter image description here

What am I doing wrong?

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That is a https://en.wikipedia.org/wiki/Moir%C3%A9_pattern

Add a small amount of randomness to the vertices to avoid that.

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  • $\begingroup$ It actually works ! $\endgroup$ – Michael White Mar 5 at 8:04
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I suppose you've set too small root radius and edge. Considering Diameter scale, it becomes 0.01 * 0.01 = 0.0001 which I believe is pretty physically accurate but almost invisible if the rest of the character is not scaled to 1.7m height. Try to increase root radius.

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  • $\begingroup$ I have set my character to real world size,the thing is not the size of the hair but the inconsistent look on different parts of every hair strand. $\endgroup$ – Michael White Mar 4 at 15:45

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