And idea what is going on with this mesh and how to fix it? I am importing .obj files with shapediver import plugin. And all of them are invalid but mesh join unify and clean usually resolves it. But there is a one or two meshes that are not affected by this fix.
General information about this mesh:
Mesh has 71 degenerate faces.
Mesh has 73 non manifold edges.
Mesh has 9 duplicate faces.
Skipping face direction check because of positive non manifold edge count.
Mesh has 510 pairs of faces that intersect each other.
This can cause problems if you're doing mesh boolean operations with it.
Mesh has 123 naked edges. Naked edges can cause problems if the ultimate goal is STL output.
Mesh has 52 faces where the face normal differs substantially from the vertex normals.
These normals can cause problems if the ultimate goal is for rendering or boolean purposes.
Mesh does not have any ngons.
Mesh does not have any extremely short edges.
Mesh does not have any disjoint pieces.
Mesh does not have any unused vertices.
ON_Mesh.m_T.Count() = 1491 (should be 0 or 6884=vertex_count).
ID: 3c23f847-bd32-4488-9870-b325b72bcf26 (6215)
Object name: Mesh: ON_Mesh.m_T.Count() = 1491 (should be 0 or 6884=vertex_count).
Layer name: Default
source = from layer
index = -1
UserData ID: CE28DE29-F4C5-4faa-A50A-C3A6849B6329
description: User text (1 entries)
saved in file: yes
copy count: 2
Open double precision polygon mesh: 6884 vertices, 13710 faces with normals
Bounding box: (-5.01,-30,-9.249) to (165.01,0.01,9.249)