Bastien Montagne
0eee776e45
When you were using autosmooth to generate some custom normals, and created empty custom loop normal data, you would go back to an 'all smooth' shading, cancelling some sharp edges generated by the mesh's smooth threshold. Now we will first tag such edges as sharp, such that shading remains the same. This is not crucial in current master, but it is for clnors editing gsoc branch!