It does happen with pretty much any object but not all.They all come from reality capture but as soon as they are voxelised it shouldnt really matter. I'll try a few other meshes and see how common it is.

I tried the same thing with photogrammetry objects. I didn't see any glitches. More steps are needed. Perhaps there's a problem with your specific object.

Hello! Upload the model directly to the Retopology room and create a new UV map.

Hi there everyone! I hope you are doing fine.   I am having some trouble regarding a poly group UV I created by accident.  I modeled some object in the Modelling Room. Accidentally I did an "AUTO MAP" command and it created seams and did the unwrapping. What I am trying to do now is to erase the UV associated to this polygroup, as I wanted to do it by hand. I understand that if the geo was created elsewhere (Modo, 3DsMax, Blender...), the UV map can be deleted there before bringing it to 3DC. However, is there a way of erasing UV maps associated with geometry created in 3DCoat directly?  Thanks for the help everyone! 

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Since v.08 3DC is compatible with RS 2.0. Are you using that version or a later one ? 3DCoat-2025-08 Thu Jun 19 08:51:04 2025 - Initial (first) loading speed issues fixed (related to Python modules loading). - RealityScan 2.0 is used as the default photogrammetry engine

Same problem as MkIII_X, even setting the instal path to realityscan doesn't really seem to do anything so i'll use the standalone in the meantime but it's a bit of a bummer to not be able to use realityscan in 3dcoat

Alright, so you need a very high res mesh around 100 million polys. Then right click and export as... When dialog opens up set it 95 percent. It should not matter if you export from a volume or a surface. But thats really it. And it works perfectly if I use the top bar menu to do the same. Then I will export the mesh without decimating.

@Toxo Hello! Please describe the steps you take to get the glitches after decimation. I'll try to replicate it.

I think it's a bit to big to share here 3.5 GB. It happens with all large photogrammetry meshes, pretty much. But only in the decimate dialog I get when I export. If I do it inside of 3Dcoat it works fine.

I think cloning with symmetry would be a solution.

No but, can you share a video to see the issue ?