Smooth Shading Problem

Hello! I have been experimenting with boolean modifiers and I recently encountered an error I can’t find a solution to. When I smooth shade, it creates dark marks. Does anyone know how to fix this?

Thank you so much for having a look at my topic or even helping me!

  • Confuzzled Potato


This most probably is a case of inverted normals (on one side of that line they point in the opposite direction from the other, hence weird attempt at interpolating shading).
Easiest solution is to go into Edit Mode > Mesh > Normals > Recalculate Outside (Alt + N).

Thank you so much, this worked! You’re a life saver.