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    Default Adjusting the Smoothness of 3D Objects...

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    I'm rather new to AutoCAD 3D, having come from an environment where I worked with IronCad extensively for years. I no longer have IronCad available to me, but I do have AutoCAD 2016. I'm doing pretty well with it, but I do have a question regarding a file I fed to a 3D printer yesterday. It has to do with the ability to adjust the smoothness of a curved object's surface. The object in question is, essentially, a ring of about 6" in diameter & 1" thick. Yesterday when I exprted it as an .stl file and sent it to the 3D printer for realization, it ended up with curved surfaces that were made up of a series of facets rater than a smooth, continuous surface. Is there a setting in AutoCAD (v.2016 in this case) that will allow me to adjust the smoothness of objects such as this?

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    FACETRES and VIEWRES maybe ISOLINES, these are system variables. You can also use OPTIONS>Display then adjust the numbers in Display Resolution section.

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    Set FACETRES to 10 and then export to .stl.

    You can also use the 3DPRINT command to export.
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