I think when I was rotating the mesh at some point I rotated it to a not perfect angle, now the symmetry is a bit off. Not critical, but in some places it is noticeable that the symmetry is not perfect. I tried variations with local symmetry, set pivot, didn’t work. How can I get the symmetry back?
If the mesh is still a perfect mirror image of itself on both sides of its own local center and it has not been rotated off axis, it should work with Local Symmetry. Disable “Dynamic” mode in the L.Sym button otherwise the feature will use the position of the Gizmo manipulator as a center.
However, the most foolproof way to force a mesh into global symmetry (mirror image of itself on both sides of the world/Tool center), is to use Tool> Geometry> Modify Topology> Mirror and Weld. This feature will mirror the exact topology of the mesh on one side of the active center then weld the two halves together leaving no possibility for deviation or human error. However, the feature is sensitive to L.Sym, so make sure that is disabled in order to force the mesh into global symmetry.
Disable L.Sym if active. Disable perspective mode so perspective distortion does not confuse the situation.
Switch on the Floor grid for the relevant axis to visualize the global center line. Setting the elevation (ELV slider) for the Floor Grid to zero will center the grids on the global center making this more easy to visualize. This is located in the Draw palette.
Nudge the model toward the center line and eyeball it into place as closely as possible. Then use Mirror and Weld. If you weren’t quite close enough and the model does not weld as intended, just Ctrl Z , adjust the placement, and try again.
Please note that Mirror & Weld only works in one direction. So in some situations where you are trying to mirror one specific side to the other, it is sometimes necessary to first flip the mesh with Tool> Deformation> Mirror.
