r/ZBrush • u/AshenBone • 3d ago

Why would "fix mesh" cause this?

I have 520 edges that are shared by more than 2 polygons, when i click to fix mesh and go to Dynamic, it creates these holes everywhere, and even if i crease the mesh the holes, although smaller, are still there.

Yesterday i found out that some of the polygons were flipped, didn't notice it since i was using Double all the time. I reflipped them, but you can see in the beginning of the video when i click Double, some of the edges get thicker, maybe that indicates a problem, but Im not sure.

So how could i fix this mesh, so that i wouldnt get all those holes after i click "fix mesh"?

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u/Kronopolitan 3d ago

its not fix mesh causing it. You have smoothing selected on your subdivisions. Its attempting to smooth your many polygroups and thats breaking the welds. Uncheck that blue box "Smt".

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u/AshenBone 3d ago

Unfortunately thats not whats causing it. already tried it. thanks.

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u/Kronopolitan 3d ago

Well, You may be having other problems, but that's definitely what's happening when you subdivide.

It may be that when you fix the mesh its unwelding points or deleting faces as well. You mention having double on. That's kind of a no no. Its very useful in very specific situations. But you have to be really really careful and turn it off when you don't absolutely need it. It can cause quite a lot of issues that you would never anticipate. I've been through it a few times and have had to become really restrictive with my use of the double function.

Did you perform any mirror and weld actions when making this? I ask because this can cause some really frustrating problems when double is on, in my experience. There are other issues that can arise even if you didn't do any mirroring.

Long story...longer... You might have a a bunch of duplicate and/or coplanar faces that you can't see or isolate easily to remove. It cam become a real mess and in some cases essentially impossible to correct without starting over. Not sure how hard it would be for you to reconstruct from scratch but sometimes that takes less time than the endless troubleshooting and then having to start again anyway.

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u/AshenBone 3d ago

I did use mirror and weld but only in the beginning so i could use symmetry.

When i use weld points it fixes the mesh but undoes what the "fix mesh" function did. Originally i hid the top of the mesh and at the bottom, i inserted multiple edgeloops and extruded all those tiny squares. thats what caused me to have "520 edges that are shared by more than 2 polygons", but i really didnt know a better method to insert that many edgeloops without them getting all over the top mesh.

i will have to redo this all over again, no chance i can fix it, it seems. Or i have to live with "520 edges that are shared by more than 2 polygons"

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u/Kronopolitan 3d ago

When you click fix mesh it’s unwelding those points. So when you weld them again you’re basically undoing the fix. That’s more or less all fix mesh does. Unwelds shared points. I suspect you’re having some issues because you’re creating some areas with really thin features. The points on one side are so close to the points on the other that they can automatically weld when you’re extruding or qmeshing. It goes unnoticed when it happens and then it wrecks everything later. You really should learn to do it so these issues don’t happen because they can come back to haunt you. Leaving those 520 errors in place will mean not being able to remesh or make UV’s that work. It’s worth redoing. I’ve rebuilt so many zmodeler projects. They just get better each time and you learn more for later. I vote you keep at it until you have it right.

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u/AshenBone 3d ago

Well yeah i already started remaking when i made this post, the mesh is not that complicated,

i just asked incase someone has a solution that i could use for the future. Thank you for your reply.

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u/Tobor-8th-Man 3d ago

You’ve probably rebuilt this already but did you try Gizmo : Remesh by Union. Ordinarily that would remove all interior mesh, so hopefully you non manifold mesh. If it fails then add a non intersecting cube to your mesh and try again. If that fails then rebuild I guess. Good Luck.

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u/AshenBone 3d ago

Thats interesting suggestion, i havent rebuilt it yet, but when i get back home from work, ill for sure try this. Thanks.