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Why is it necessary to recalculate normals?

Forum Archive › Why is it necessary to recalculate normals?

Viewing 4 posts - 1 through 4 (of 4 total)
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  • April 22, 2025 at 6:57 am #20072
    yousaf khalid
    Participant

      Why is it necessary to recalculate normals?
      Like I think it doesn’t matter if its red or blue (inside or outside)

      But I think I maybe wrong, so thats why I am asking this question

      why is it important to recalculate normals?
      what if we dont?

      I would appreciate your answer.

      April 22, 2025 at 7:31 am #94595
      Omar Domenech
      Participant

        It is super important to recalculate your normals, otherwise Blender will get confused as to what the front and the back of the face is and it will cause all sorts of problems, be it with lighting calculations, modifiers, simulations, etc.

        April 22, 2025 at 7:33 am #94596
        Martin Bergwerf
        Participant

          HI Yousaf,

          Inconsistent Normals can cause a lot of problems; here is an example of what happens, when you try to Bevel the highlighted Edges of the left Cube:

          Normals.png

          April 22, 2025 at 10:09 pm #94597
          yousaf khalid
          Participant

            Thanks martin and omar to clear my confusion.
            Now I know why its important

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