How to fix this imported mesh problem?

[Gustavo_Soares_Silva]

Hi, I’m having an issue when importing models from SketchUp into Rhino.

It seems that some of the mesh faces come in inverted, even within the same face, which causes holes to appear. It also looks like there are overlapping or intersecting sub-meshes in certain areas. The model looks fine and well-built in SketchUp, but this problem occurs during export/import.

Is there any way to fix this without having to remodel everything from scratch?

I’ve attached a sample file showing the issue.
BugMeshFaces.3dm (2.0 MB)

@Jussi_Aaltonen

RH-86616 Sketchup export: modifies mesh normals

Note that McNeel have a youtrack open on this issue. By now I just want to fix my geometry, I’m plannin to import some 3D Warehouse models to do a interior design project and in case of bug I want to have a quick fix. I tried MeshRepair but it did not solve it.

Thanks for your attention.

[nathanletwory (Nathan 'jesterKing' Letwory)]

• explode mesh _Explode
  
  
• switch to mode showing backfaces
  
  
• unify mesh normals _UnifyMeshNormals, then check for faces that are still facing the wrong way around
  
  
• select incorrectly oriented faces and flip them _Flip
  
  
  
  
  
• select all _SelAll
  
  
• join them back up into one mesh _Join
  
  

[Gustavo_Soares_Silva]

It worked! I’m a big fan of yours — you’re always so helpful. I hope Mr. McNeel gives you the raise you deserve soon