jesterKing
Small Rhino Render Mesh being simplified on import into Blender
When I import very small parts (smaller than 0.1mm thick - i.e. painted logos on an in-ear headphone) into Blender the mesh is not the same as that which I saved in the Rhino file - it's as if there is a scale and the mesh is being reduced when the polygons are smaller than a certain size. If this is the case is there a setting where I can set this scale/size to be much finer?
If I scale the geometry by 10x in Rhino then scale by 0.1x in Blender after importing it - it retains the correct mesh - but this is a work around rather than ideal.
This is likely due to vertices of meshes being merged during import, see here https://github.com/jesterKing/import_3dm/blob/5465fcadba4af6868d28466d2e18cba6b4e09b1b/import_3dm/converters/render_mesh.py#L107
This is not currently exposed as an import option. You can probably just set needs_welding = False in your version as a quick fix, or create a PR with a proper fix.
See also this issue: https://github.com/jesterKing/import_3dm/issues/137
