I have this problem: Copying Vertex Normals
I have a head and a body that need to be separate objects, but they need to join seamlessly. Viewing them in object mode, I see the seam.
I can use the Data Transfer modifier or operation to copy "Custom Normals" from the body to the head with a max distance set so only normals near the seam are affected. Visually, that works fine. The seam is gone in the view.
But I need to export and when I go into the data model, the normal vectors haven't changed at all, even when I use the data transfer operator or apply the modifier. That is, bpy.object.data.vertices[1793].normal doesn't change before and after the operation (where 1793 is on the seam). So what is the view using to show the transferred normal? And how can I get at that normal through the data model so I can export it properly?