Problem importing DWG curves from Illustrator – corners break or distort

Hi everyone,

I’m having an issue when importing a DWG file into SketchUp that was originally exported from Adobe Illustrator.

The vector drawing consists of smooth curved shapes with precise corners. In Illustrator, everything looks perfect. However, once imported into SketchUp, some corners appear broken, distorted, or disconnected. The curves come in as faceted lines (which is expected), but the junctions between segments — especially where curves meet or connect with straight lines — are visibly flawed, and sometimes small gaps are created that prevent faces from forming.

I’ve tried the following steps:

  • Increasing anchor points to the maximum in Illustrator
  • Simplifying and expanding the paths
  • Exporting as DWG and DXF (tested versions: 2007, 2010, 2013)
  • Ensuring unit consistency between Illustrator and SketchUp
  • Disabling “merge coplanar faces” in the import options
  • Using Weld and Edge Tools² plugins to fix geometry

Even after adding as many anchor points as possible before exporting, the issue remains — the corners still come in with imperfections.

Below are two images showing the correct geometry in Illustrator and how it looks after importing into SketchUp.

Any ideas on how to preserve curve continuity and avoid these distortions during import?
Thanks in advance!





What import units are you selecting when importing the .dwg file? Can you share the file?

How are you planning to use the file once you have it in SketchUp? Can you share the .dwg file?

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I’m planning to use the file in SketchUp with all faces closed, so I can extrude each piece individually. That’s why it’s important for the curves and corners to import correctly without gaps or broken geometry.

Regarding the import units, I’m using meters both when exporting and importing to keep everything consistent.

I’ll share the .dwg file and .ai— thank you for your help!

I couldn’t attach it directly through the forum, I believe it was because the files were large, so I uploaded it to Google Drive.

Besides adding an almost insane number of anchor points in Illustrator, you can also try straightening the segments before exporting.
Also, you could try exporting as millimeters and importing to SketchUp as meters. Some of the resulting glitches seem to result from the geometry being very small.
Just suggestions.

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Just an update — I found a solution that worked perfectly for my case!

Instead of using DWG or DXF, I exported the file as a PDF from Illustrator and then imported it into SketchUp using the plugin Estimator for SketchUp.

Surprisingly, the import was:

  • Perfectly accurate
  • Smooth curves preserved
  • And each shape came in as a separate group — which was exactly what I needed.

Hope this helps someone facing the same issue. Thanks to everyone who offered suggestions!