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Given a model that was symmetrical but who now no longer is. Is there a way to delete half the model and remirror or to straighten the symmetry out.

woops

You can see in orthographic mode that the top (and front) of the model now no longer aligns with the z axis but the middle does.

There is a multi res modifier on it at the moment in case that makes any difference.

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Try this:

  • This will almost certainly screw up your Multires modifier, so apply it.
  • Select a vertex on the one half—say the left one—and hit Ctrl+L to select everything connected to it.
  • Delete it with X.
  • Move the boundary of the top section to align with the Z-axis.
    • You can try SX0 and then setting X to 0 in the transform properties, you'll probably still have some cleanup to do even if you use proportional editing.
  • Go out of edit mode and use a mirror modifier. (If I remember correctly, there's a Remove Doubles option you should use.)
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  • $\begingroup$ Applying the multires modifier crashes my laptop or when it doesn't it makes it unusably slow. :( $\endgroup$ – Wes Oct 10 '17 at 17:11
  • $\begingroup$ Hm. Are you sculpting? Try the Apply Base button and then either just removing the modifier, or stepping down the resolution and then applying it. (The reason I said to apply it in the answer was because I didn't want you to lose all your sculpting work.) $\endgroup$ – SilverWolf Oct 10 '17 at 17:21
  • $\begingroup$ Thanks seaturtle I've voted you up but i'm just simply not going to be able to remove half after the modifier is applied. Theres 5 levels of subdiv here. I can remove the edges in edit mode like the top pic anything above that and its hard to even see what the central vertx loop is. $\endgroup$ – Wes Oct 10 '17 at 20:17
  • $\begingroup$ Hm. Does stepping it down before applying it help? How about orthographic mode (Num1 then Num5)? $\endgroup$ – SilverWolf Oct 11 '17 at 12:52
  • $\begingroup$ Wireframe just displays as a solid outline thats how dense the subdiv was. I've removed half in edit mode for the moment but accidently saved over origional file. $\endgroup$ – Wes Oct 11 '17 at 13:48
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Idk if this can work for you, but there's also an edit mode "symmetrize" tool that can help to make a mesh symmetric in another way:

eg: from this

enter image description here

you get this

enter image description here

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  • $\begingroup$ Thanks I tried that it seemed to mirror on top of itself. $\endgroup$ – Wes Oct 11 '17 at 13:48

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