Bad mesh --- good polysurface?


Hi I am trying to send to 3d print a file. The polysurfaces doesnt have any error…when I convert to mesh…some of the pieces show me errors.

Is it possible to know what is hapenning ?


(John Brock) #2

Fitting a mesh to a polysurface is a process. You have control over the settings. Starting with a good polysurface generally results in a good mesh but not always. Starting with a bad polysurface will never result in a good mesh.

The prudent thing to do is to start with a clean, closed polysurface.
Make your mesh according to the settings you need.
Hide the polysurface, and Check the mesh. It will usually be good but not always. When the mesh has problems, use the tools in Rhino to make it good.
Then export that good mesh.


The polysurface seems ok ! pass the analysis. How can i repair a mesh?

(Chris Kuether ) #4

Mesh Repair Tools – top menu bar…


Ok thanks. I am trying to decode from the error window…which tool use.

(Chris Kuether ) #6

What does the error window say?

Most ‘repairs’ are done with mesh repair tools Fill hole or fill all holes.


one of the pieces says “Here is what is wrong with this mesh:
Mesh has 2 non manifold edges.
Mesh has 1 duplicate face.
Skipping face direction check because of positive non manifold edge count.

In grey the bad ones…

(John Brock) #8

The Help article for Check is a good, quick overview.
If you need a more detailed tutorial, the Scan, Cleanup, Remodel white paper is good.