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I am having an issue when adding divisions, either through loop cut tool or subdividing, that creates visual glitching. I have smooth shading turned on, and edges marked as sharp. This is not happening on a version of the model with Ngons, which I am cleaning up to be in quads.

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  • $\begingroup$ Try maybe to remove custom split normals (Properties editor > Object data tab > Geometry data) and recalculate normals. This appears to be related to normals' vectors $\endgroup$
    – Mr Zak
    Aug 27 '20 at 22:28
  • $\begingroup$ Hello, have you tried recalculating the normals of the mesh? (Selecting all faces in edit mode -> Shift + N to recalculate). Also, 'removing doubles' if there are faces in the same place (M and clicking on merge by distance). $\endgroup$ Aug 27 '20 at 22:31
  • $\begingroup$ Thank you @MrZak , I needed to "Add Custom Split Normals Data" $\endgroup$
    – Noah
    Aug 27 '20 at 22:44
  • $\begingroup$ @EduardoAbreu Thank you $\endgroup$
    – Noah
    Aug 27 '20 at 22:45
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Object Data Properties > Geometry Data > Add Custom Split Normals

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