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I am new to 3d modeling, and I have some problems after finishing my project. To preface, my goal was to create a tiger mask.

My problem is that when I show my non-manifold elements, I have some non-contiguous and boundaries non-manifold, shown below: enter image description here

enter image description here

As I said, I am new to 3d modeling, but I did notice that the boundaries ones were shown where there was a hole or opening, as in the eyes, mouth, or back. Why would this be? I could find nothing that would cause the non-contiguous ones as well.

Evan Revis
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    Related - http://blender.stackexchange.com/questions/7910/what-is-non-manifold-geometry. Loops which are disconnected from other geometry even if have connections to parts of mesh (like those selected on your mesh) are also treated as non-manifold. If you add some thickness to your mask, the mesh will be treated as manifold. You can use Solidify modifier for that. – Mr Zak Dec 26 '15 at 23:07
  • If the mesh is not closed, that is one type of non-manifold geometry. Adding a Solidify Modifier is one solution, if you're concerned about it. In real life too, a mask could not be infinitely thin. – Mentalist Dec 27 '15 at 00:08
  • Thank you, this seems to have fixed my boundaries, but I still have quite a lot of non contiguous. What could these be caused by and should I worry about them? – Evan Revis Dec 28 '15 at 02:36
  • I realize you have long since figured it out, but this is one of the top Google hits for when I was trying to find out. Non-contiguous means that some of the normals are facing this way and some are facing that way. Recalculate your normals, and if you have a good mesh, it should work itself out. – Nathan Aug 25 '17 at 23:20

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