I'm trying to create a simple human mesh. While working on the torso, I noticed some shading errors. They look even worse when you move the camera around.
The one on the left is with shading set to smooth and subdivision set to 5 on basic, the one on the right is shading set to flat, and no subdivision.
Here's another one...
I've found that I can replicate the effect by simply making vertices go into the mesh.
Does anyone know how these could be fixed?