I was modelling the torso of a female body using the box model technique. Applied a mirror modifier and started to scale the mid section of it when a gap appeared. How do I fix or avoid this? Mirror Modifier Settings are as follows:: Axis: X - selected; Options: Merge, Clipping, Vertex G - all selected; Textures: nothing selected.

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  • $\begingroup$ Check "Clipping" within the Mirror Modifier $\endgroup$
    – Dontwalk
    Jan 7, 2016 at 20:15
  • 2
    $\begingroup$ they were not merged at the first place , to make sure they are merged select the middle verts and click S-X-0 ( resize to zero on X ), after they are merged they wont split again $\endgroup$
    – Chebhou
    Jan 7, 2016 at 21:35

2 Answers 2


Select all the vertices (Alt+RMB) that should be at the mid point, then press scale along the x axis(whichever is the horizontal one) and press zero (SX0) this will align them all in a straight line.


You can avoid it by turning on Clipping in Mirror Modifier.

  • 3
    $\begingroup$ Add more details, screenshot perhaps. $\endgroup$ Jul 18, 2020 at 10:42

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