Dark shadow on some faces, already recalculated normals and merged vertices I'm encountered similar problems a few times and can't figure it out. I have simple low poly mesh, normals are correct and there are no extra vertices but still some faces look darker.



flat shading mode

Proof of no extra vertices
https://gfycat.com/niftyshockedclingfish.gif
This error is most probably caused by shade smooth.
To fix this go to object data properties -&gt; Normals -&gt; Check the Auto Smooth Checkbox