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I have a dinosaur mesh (more or less thanks to this). Around the 11:55 mark or so, he shift+d's the toe from one side of the foot to the other. However, I observe that whenever I turn on subdivision surface, there is a strange crease in the mesh.

enter image description here

What did I do wrong to cause this crease? What can I do to get rid of it?

Thanks alot! Blend is here.

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  • $\begingroup$ Do you have any double vertices or a crease setting? $\endgroup$
    – Legoman
    Commented Dec 3, 2018 at 23:11
  • $\begingroup$ I just hit "remove doubles" and I don't appear to have any, no. I can double check the creases... and no. $\endgroup$ Commented Dec 3, 2018 at 23:45
  • $\begingroup$ can you add your blend file to your question? Grab the URL of the question Go to blend-exchange.giantcowfilms.com Select the blend file Add the url of the question Grab the url that results Go back to the question and edit it Add the new url to the bottom of the post $\endgroup$ Commented Dec 4, 2018 at 0:54
  • $\begingroup$ See if there's a face inside of the mesh like this youtu.be/ZtSh4Yedafg?t=1946 $\endgroup$
    – AshKB
    Commented Dec 4, 2018 at 3:51

2 Answers 2

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You have inner faces, delete them and it will work:

enter image description here

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  • $\begingroup$ Hmm, what could I do, out of curiosity, to create such faces by mistake? $\endgroup$ Commented Dec 5, 2018 at 21:48
  • $\begingroup$ you might have pressed f by mistake $\endgroup$
    – Clobro
    Commented Jun 13, 2021 at 0:54
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Either there are multiple vertex points in the same spot, or those edges are marked sharp, and should appear blue in edit mode

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