I am building, with Python scripting, a sculpture by creating many plane meshes and joining them together. I have full control of the planes' surface normals, but I'm confused how to set them. As of now, I'm setting them arbitrarily, and the render seems fine.
My intuitions about surface normals are that neighboring faces should have smoothly varying surface normals so that there's no shading discontinuity. Also, when a surface's normal points away from the camera, it appears dark. Are my intuitions correct?
In my case, it's a 3D sculpture that's supposed to be ready for view from all angles, so I can't really set the surface normals w.r.t. a fixed camera. Can I then just set them arbitrarily?
Also, what is an easy of ensuring "neighboring surface normals are smooth" with Python? Maybe some post processing that smoothes over the mesh?
Here is my model.