Strange way of handling autocad Regions


For a couple of versions, dwg imports handle autocad regions. Importing and Exporting CAD Files | SketchUp Help, confirmed by the import dialog that reports imported regions.

But I find the result not very exploitable.

See for yourself :

Autocad Region.skp (285.6 KB)
Autocad Region.dwg (77.6 KB)

It imports a smoothed face and deleting the face would also delete its outline, unless we unsmooth it and smooth it again.

note : I have autocad 2014, saving dwg as 2010 version