Exploded Vertex Normal Editing

For low polygon models, it would be very useful to be able to manually edit vertex normals. The best way I've seen to do this is to have an exploded view of the mesh, each face temporarily extracted along its normal a small distance. Then a user could easily select a faces vertex normal and edit it with either a gizmo or with properties. Useful Buttons would include:

• Copy
• Paste
• FromFace (set a vertex normal to the face normal)
• Average (to the average of all the shared vertex normals, or the selected normals)
• Invert