Export mesh issue

Rhino Rhino for Windows
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1

Hi everybody, a few days ago I tried to export the render mesh like new 3dm file. It was ok, the file was a bit smaller then the one which contain the polysurfaces, but I notice that even export directly the selected mesh , if I copy and paste it in a blank file I get a significant file size reduction. Anyone knows why?

those are the 2 workflow:

starting file size (polysurfaces) 864Kb

1st WORKFLOW:
-extractRenderMesh
-invert
-export selected
-new 3dm file
-file size 769Kb

2nd WORKFLOW:

-ExtractRenderMesh
-select the mesh
-copy
-paste in a blank 3dm file
-file size 48.9Kb

Anyone knows why?

2

Hi Andrea - and you’re certain that no surfaces exist in the first (Worklow 1) file? DoesInvert select some other stuff you did not expect?

-Pascal

3

No, in the exported file there are no surfaces. using -saveas and unflagging SavePluginData is a bit better but still bigger. Seams something related to the file source code.