Blender 2.75 is out. Thanks to Gaia, it now exports "custom" normals. These are modifiable normals at a vertex that can be different for each face meeting at the vertex. This is one of the things that has been lacking for a long time. One of the uses of them is making better slightly rounded edges. I am going to describe that here because the process is quite complicated and there are some caveats that were unexpected, at least to me. Real things don't usually have perfectly sharp edges. Highli