How to fix the topology issue like this one?

[MichaelNovaczewski]

Hi,

I have a model that I wanted to be symmetrical so I deleted the half of it, mirrored it and merged into one subtool.

But now I have the polygons that are overlapping with each other.

How can I fix that without destroying the detail?

I try to dynamesh with keeping groups but then dynamesh created disconnections between playgroups.

I tried ZRemesh it but than overlapping polygons are still there.

I tried to delete it manually and then bridge it but I can get it done properly… I can connect two-edged together but it’s too much of the process and the close hole doesn’t work properly on this model.

How should I approach fixing this kind of issue?

Please help me, I have no more clues on how to do it :(!

Best,
Michael

[Spyndel]

Hello Michael

The best way to force mirror symmetry on an object is to use the Mirror and Weld function (Tool > Geometry > Modify Topology > Mirror and Weld). This will mirror the mesh along the selected axis at the center, and weld any points together that are close enough to each other.

Note: This function only works in one direction, so in some situations it may be necessary to first flip the geometry to the other side with the Tool > Deformation > Mirror action.

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If certain points on the mesh are close to the mirror plane, but not close enough to be welded and causing a seam as a result, simply drag them across the symmetry plane with the move brush prior to performing mirror and weld. They will then be “cut off” by the M&W action.

To help visualize the symmetry plane, you may wish to switch on the Floor Grid. Make sure the elevation(ELV slider) is set to zero in the Draw menu.

[MichaelNovaczewski]

Thanks Spyndel for a fast a clear respond

I did as you said and now I need to close the holes of the mesh. What is the best way to do it?

• With ZModeler I’m able to bridge only two polygons at a time, right?

• Close holes do not what I want (see screenshot)

• And the CurveBridge - I think it does not the job or I miss something… I tried to curve two oppositely edges with the shift holding but nothing happens. I think it doesn’t work on the holes properly.

Can you advise me with that?

[MichaelNovaczewski]

I tried with bridging two polygons in some are and then filled it with ZModeler Close Holes. It worked okay, do you think it is the right way of approaching this model?

[Spyndel]

Oh no! I’m not sure how we ended up in a worse situation than we were originally. Where did all the geometry near the center line go?

To be clear, with M&W just use it directly on your original, intact mesh. Don’t bother deleting half or trying to match up two ill-fitting halves. It isn’t necessary.

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Originally you were having trouble because you were trying to weld together two pieces that didn’t quite match up at the center line. With Mirror and Weld though you’re only working with a single mesh, and it will weld the geometry at the center line as long as that half is close enough to the mirror plane. If the figure is symmetrical and mostly flush with the mirror plane at the center, that should be all that’s required.

This is why I had you switch on the mirror plane to visualize the center line. If your mesh is off center, you may have to move the target half closer to the mirror plane to get better results.

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If there is geometry near the center line causing a seam issue, then simply move it across the mirror plane and perform another Mirror and Weld. The problem geometry will be cut off:

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In extreme cases of an off-center mesh that is not flush with the mirror plane it may be easier to extrude some geometry from the target half first, rather than to try to bridge it after the mirror.:

This may result in some messy topology and alter your form significantly though, so it is better to not end up in this situation in the first place with mesh discipline.

[MichaelNovaczewski]

Sorry, Spyndel for slow reply - I was out of home!

Thank you sooo much for you indepth help! You are fantastic

I mangae to do this

Have a great day!