Hi Everyone,

I’ve got a semi-complex polysurface made of 270 surfaces that’s causing me problems with meshing. Object description tells me, it’s a **valid closed solid polysurface**.

While tesselating that polysurface for SLS-output, Rhino is generating a bad mesh.

Settings: Density: 1.0 / Max. angle: 3.0 / Max. distance edge to surface: 0.01 / Min. inital quads: 500

Afterwards, mesh analysis gives the following feedback:

Here is what is wrong with this mesh:

Mesh has 41 degenerate faces.

Mesh has 258 non manifold edges.

Mesh has 103 duplicate faces.

Skipping face direction check because of positive non manifold edge count.

Mesh has 374369 pairs of faces that intersect each other. This can cause problems if you’re doing mesh boolean operations with it.

I tried changing the meshing settings with no succcess. Mesh repair wizard isn’t able to repair the mesh either. Checking the mesh visually, everything looks good, so I’m quite lost on solving that problem.

The number of *374369 pairs of faces that intersect each other* made me wonder if the whole thing is duplicate and has a complete set of surfaces that overlap exactly, but that’s not the case. The mesh only has 290368 vertices, 292965 faces overall, by the way. [edit: this special problem dissapears with certain meshing settings. The others stay, with changing numbers]

I wonder, is there any command that can give me feedback which parts of the mesh are bad (degenerate/duplicate…) and zoom onto them? With that help I could try rebuilding the original NURBS surfaces. Rebuilding 270 surfaces with a try-and-error approach is just not an option.

Has anyone had a similar problem before? Any suggestions are appreciated

Thanks in advance,

Stefan