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I was following this tutorial Blender Character Modeling 2 of 10

and when I switch the subdiv modifier on and I move points about it just pulls the model out of shape, makes the surface react like weird scales and makes holes all over the place. What is my problem?

enter image description here

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    $\begingroup$ Did you try to select all and remove doubles ? (command is accessible via e.g. W menu). Also is the Subdivision Surface modifier the first one in the stack ? $\endgroup$ – Mr Zak Dec 16 '15 at 15:45
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The issue you are having is caused by not connected topology, those faces are separated from the rest of the mesh. Let me illustrate:

This is how a basic plane looks with a Subdivision Surface modifier:

PlaneSubDiv

Notice that the edges are all rounded. Now if I extrude an edge, it will remain connected, while if I duplicate it then it is disconnected and I will need to remove doubles:

Plane Edit

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  • $\begingroup$ I had two extra random modifiers and when I removed them the problem seems to have sorted itself cheers $\endgroup$ – Dave Goateze Dec 16 '15 at 17:17
  • $\begingroup$ Like an edge split modifier? Which ones? $\endgroup$ – VRM Dec 16 '15 at 17:18
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    $\begingroup$ I think I added two extra subdiv surface modifiers $\endgroup$ – Dave Goateze Dec 22 '15 at 3:04

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