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I am learning modeling on Blender and I have some difficulties with the subsurf modifier.

Here is my mesh with the modifier display off : enter image description here

And here it is with the display on : enter image description here

Some edges are twisted and I don't understand why. I tried to :

  • removes doubles
  • recalc normals
  • delete the vertices and make a new one (makes it even worst)

Could someone, please, explain me why it is happening and how can I correct it?

Thank you,

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1 Answer 1

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It looks to me like there are vertices in your mesh that are not attached. See the video below.

enter image description here

Double check all of the vertices around your twisted area and merge those that aren't connected by press Alt+M on the keyboard.

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    $\begingroup$ Hello @CyberBurst , Thank you for your advice. It was not my case but it gave me the solution. I deleted the edges and not only the vertex. Simply removing the edges and creating new ones resolved my problem. Though I still don't know why it happen. $\endgroup$
    – Toukenath
    Jul 29, 2016 at 8:29

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