IGES Format out of Creo

[msc-turb]

When exporting IGES out of Creo, cylindrical objects/features fail in pygiges.
For example purposes I have created a cylinder in Creo and exported into iges, then read in pygies.
The shell surface is ok, but top and bottom surface are quadrats, not circles.

I am trying to export from Creo objects, that are complex parts and due to this it won't work.

Has anyone in the community come up with a reliable method to get from a CAD part a VTK? I can export from Creo in a lot of formats, would be good to know if someone succeeded here. STL is not an option, because the surfaces are too complex for that.

Overview of Creo vs Pyiges.

Iges File (renamed to text)
test.txt