Mesh analysis

Hello, I have imported an OBG object which looks different from the NURBS I created. I mean differences while shading, please, see the attached pics ( converting my NURBS to mesh didn’t help ). How can I achieve the same results in my NURBS? Any help related to the issue will be highly appreciated. Thank you.

here is a source file:
request.3dm (11.7 MB)

Hi Bakuri - Unweld the mesh at 90 degees - make sure ModifyNormals=Yes.


Hi Pascal. Thank you for your quick replay,
I have tried it, and it worked perfectly. :pray: