Surface subdivision modifier causing this pinching

This is so strange, the joins have this pinch effect. I’ve tried removing doubles (there aren’t any), and various other techniques such as scaling, but even that makes the pinch more extreme… Help please!


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Oh I worked it out, my normals were inversed. I will leave this here though for if anyone else has the problem.

A → Shift + N

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Well thought of. Other culprits:

  • Inner faces (use X-ray to find them)
  • Smoothing option doesn’t work for added faces - do flat surface and then smooth again

Have fun

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Well solved by yourself. It is probably the primary thing to check for most problems.

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