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I'm trying to fix the geometry of the inset faces on the pillar after I used the "shade smooth" option. I added the Subdivision surface Modifier and the Bevel Modifier, but still the faces which are inset into the pillar, look bad. The inset faces should be with sharp corners all the way, meanwhile I get this. I also tried the Auto Smooth option instead of Bevel Modifier but no change there either. All transforms (incl. scale) after creation are applied. I'll be grateful for help.

weird geometry

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  • $\begingroup$ hello could you please share your object? pasteall.org/blend $\endgroup$
    – moonboots
    Commented Feb 15, 2022 at 15:34
  • $\begingroup$ This looks like shading artifacts because the face is not coplanar. What does the top of the object look like ? $\endgroup$
    – Gorgious
    Commented Feb 15, 2022 at 15:47
  • $\begingroup$ @Gorgious It looks the same as the bottom. imgur.com/a/ddwIVub $\endgroup$
    – Ylem_One
    Commented Feb 15, 2022 at 16:38
  • $\begingroup$ @moonboots there it is: pasteall.org/blend/c4c30b7c6a6a408f9194013a4f91ff16 $\endgroup$
    – Ylem_One
    Commented Feb 15, 2022 at 16:53
  • $\begingroup$ Oh I think you have a subdivision surface and / or your scale is not correctly applied $\endgroup$
    – Gorgious
    Commented Feb 15, 2022 at 16:59

1 Answer 1

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It's because of your topology. You have given a Subdivision Surface modifier to your object (which may be not necessary by the way) but with the current topology it rounds these slots. To keep them square create this edge loop with the knife tool (K to activate, A to cut orthogonally, C to cut through). You also need to get rid of overlapping vertices with a Merge operation.

enter image description here

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  • $\begingroup$ Disabling Subdivision Surface seems to solve the problem, yet I'd like this object to be more subdivided. I do not get the second part of the answer. "A" key doesn't corelate with orthogonal cutting in my version (2.92), it does nothing, it's not assigned to the Knife tool. $\endgroup$
    – Ylem_One
    Commented Feb 15, 2022 at 18:56
  • $\begingroup$ oh ok until Blender 3 you need to use K to activate, Z to cut through, C to cut orthogonally $\endgroup$
    – moonboots
    Commented Feb 15, 2022 at 18:57
  • $\begingroup$ You can disable Subdivision Surface because it seems useless here, but the reason why you had these effects is because of your bad topology, so if you want to keep the Subdivision Surface for some reason, add this edge loop to keep these slots rectangular $\endgroup$
    – moonboots
    Commented Feb 15, 2022 at 18:59

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