We just published a new tutorial on fixing non-manifold errors in your models, with lots of examples and videos. Please let us know if there’s anything you think we missed and we’ll add it!
Any posts before August 1st 2024 might hold outdated or incomplete content. They are part of our history and evolution of the company and as such we will keep them online for now
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New tutorial: fixing non-manifold models
March 31, 2009
I spent several hours yesterday night trying to fix model errors that didn’t show up in Meshlab or Blender, but that didn’t go through Shapeways (mostly inverted normals error). I thought it might be useful to know how I fixed it (I was using ViaCAD Pro). It seemed to be a problem with overlapping solids.
In the end I did a “merge solids” (or “add solids”) for all connected parts, and then it passed all checks. You can see the final model here
http://www.shapeways.com/model/24386/planetarium.html