how can i repair bad face orientations?

https://imgur.com/a/hjbAJOM
somewhere during the process i managed to ruin most of my buttons. any tip to repair it after so late?

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Reply
  • Dwayne Savage(dillenbata3) replied
    Solution

    Select all the red and press shift+N to recalculate normals outside. 

    1 love
  • Martin Bergwerf replied
    Solution

    Or, just Select everything and then re-calculate Normals. So that is: A, SHIFT+N.


    2 loves
  • raspora replied
    YEHEEEEEEEEEEEEEEEEEEES Thank you :) it did repaired it . 
    1 love
  • raspora replied

    https://imgur.com/a/r6NzBEG

    just wanted to show that . its keeps nonstop happening . like i do the same as the video and i was copy every dot was the same. i modify both 5 circles the same time and its just keeps randomise the result . 

    1 love
  • Omar Domenech replied

    That is normal blender behavior, you just got to keep correcting the normals and check every now and then.

    2 loves
  • Adrian Bellworthy replied

    Circles are notorious for giving flipped normals,

    This is because there is no face when you add the circle, only vertices and edges...

    It depends in which direction you extrude on what direction your normals will face.

    If for example you extrude in the positive or negative Z direction

    Positive Z direction...

    EXT_PosZ.png



    And Negative Z direction...

    EXTNegZ.png

    1 love