Full Version: 3dm v6 conversion to 3dm v4 or v5 on a Mac?

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Hi Tom, an STL file only contains triangle mesh data, not CAD surfaces and solid data.

Probably the STL converter will generate a polygon mesh object in the Rhino file, and MOI will not read those types of objects.

There is a converter for 3DM Rhino v6 to Rhino v5 converter available here (both Windows and Mac):
https://moi3d.com/resources#Rhino6/7/8_3DM_file_format_to_Rhino5_3DM_file_format_(MOI3D_compatible)_converter

But I think that is only one part of the problem, you will still have the problem that an STL file only contains polygons in it and not structured CAD data like spheres, cylinders, and smooth surfaces.

There is some more info on polygon mesh data versus CAD model data here:
https://moi3d.com/faq#Q:_Why_can_I_export_to_.obj_format.2C_but_cannot_read_.obj_format_into_MoI.3F

Some recent discussion on the forum here:
http://moi3d.com/forum/index.php?webtag=MOI&msg=12004.1

- Michael

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Thanks Michael.

That's very useful to know. I did used to know this, but age, (and memory in particular) has got the better of me! :)

Best,

Tom

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Michael,

I tried to run the 3DM Rhino v6 to Rhino v5 converter, followed the prompt to execute the terminal command, but terminal just responded with this:

xattr: No such file: /Applications/Convert3DMToRhinoV5

Is this a security permissions problem as I then get a prompt to move the converter to the bin.

I could try running MacOS preferences and clear it manually?

Tom

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Hi Tom,

re:
> xattr: No such file: /Applications/Convert3DMToRhinoV5

You would get this if you tried to run it directly from the Downloads folder.

After downloading it, drag it over into the /Applications folder, then give it another try.

- Michael

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