I created a cube and then 'ctrl + R' to create a line of symmetry for the cube (Vertical). Then I 'x' to delete the left vertical and add a modifier of mirror so that the cube could be adjust by only changing one side. But when i try to adjust the size by 's', the line of symmetry will move with other line as well, which I did not expect to happen. As shown: enter image description here

But actually I want something like this: enter image description here

Have I done something wrong?

  • $\begingroup$ Either Clipping isn't enabled in Mirror modifier settings or one or several vertices were already past mirror plane so Clipping didn't get them. Enable it and move vertices a bit so they stick to the mirror plane (or select all vertices on the mirror plane and scale them to 0 by axis perpendicular to mirror plane, X in your case, etc). See blender.stackexchange.com/questions/15347/… $\endgroup$
    – Mr Zak
    Feb 3, 2018 at 15:53
  • $\begingroup$ You could scale with reference to the 3d cursor, where the cursor is at the 0 point on the desired axis $\endgroup$ Jul 2, 2022 at 23:42

1 Answer 1


The easiest way to fix weird mirroring is to create a new empty and use that as your line of symmetry by selecting it under Mirror Object

enter image description here

If it doesn't work as you expect this is usually faster than messing around with whatever it is.


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