Blender 4.1 and later removes the "Auto Smooth" feature, replacing it with either the "Smooth By Angle" modifier or the "Shade Smooth By Angle" function that marks edges Sharp by angle. This can ...

On Blender 2.79, users was allowed to use autosmooth to export smooth & sharp shading in gltf files (which was very convenient by the way, should be a great default behaviour to remerge IMO), but that ...