I’ve got a mesh with a few standalone disconnected faces floating freely. If I use the Make Normals Consistent command on the entire mesh (either Ctrl+N or Ctrl+Shift+N), the normal direction of one of the faces always wants to point in the opposite direction of the other faces.
If I select just that problematic face and use that same command on it to flip its normal, and then afterwards select all faces in the mesh and use the same command, the problematic face goes back to facing the wrong direction again.
Other things I’ve tried:
- The Flip Normals command, on just the problematic face
- The Set Normals From Faces command, on just the problematic face
- Bridging the problematic face to one of the “good” faces. This works, until I remove the temporary bridging face.
- Rotating the face so it faces the right way.
- Scaling the face by -1 on one of the axes.
Basically, I can tell just the problematic face to have its normal pointing in the desired direction, but once I use Make Normals Consistent on the entire mesh, the problematic face goes back to misbehaving.
What gives? If the above isn’t clear, imagine the center face in this diagram always wants to point in the opposite direction of the other two faces when using Make Normals Consistent, no matter what I do: