I need to make an object with two types of rounded edges through Bevel (Ctrl+B). A large rounding of 6 segments, and a small rounding of 3 segments. But I get some strange, unwanted shading. Such as shown in the screenshot. I even tried to add a small rounding through the Bevel modifier, but this shading still appears.

enter image description here

Tell me, please, what am I doing wrong? Why do things like this happen in such simple geometry? How to get rid of this unwanted shading? Wireframe: enter image description here

  • $\begingroup$ can you post a screenshot of the wireframe? $\endgroup$ Commented Jan 13, 2022 at 14:19
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    $\begingroup$ Alexandre I just added a screenshot of the wireframe to the start post. $\endgroup$
    – DmitryKz
    Commented Jan 13, 2022 at 14:31
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    $\begingroup$ Looks like you've created an n-gon somewhere. You can try Auto-Smooth or inset the face to create a ring of quads around this face $\endgroup$ Commented Jan 13, 2022 at 14:49

1 Answer 1


Looks like the issue is you have a big n-gon (a face with more than 4 edges). This is usually not good practice and can sometimes lead to shading issues like this. The N-gon plus the bevel is making blender a little 'confused' on how it should smooth the shading.

Here I have replicated the issue: enter image description here

Notice how this face has many edges. enter image description here

A simple way to prevent this is by creating a new edge loop by insetting the face, creating a "buffer" for the smoothing. Like this: enter image description here

Result: enter image description here

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    $\begingroup$ Wow Alexander, thank you very much. Live and learn. $\endgroup$
    – DmitryKz
    Commented Jan 13, 2022 at 15:00

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