Automatic edge splitting

[micheus]

Besides the hard edge command you can use the auto-smooth with an angle tolerance to set some hard edges as you said.
But, I don't think we can have the edge splitting that way since Wings3d works with manfold meshes only. So, have two edges sharing the same vertex is like to have a hidden hole or a zero area face between them. Any mesh cleanup should to remove that.

Maybe it should be something to be added to the exporter as we already have the smooth group option. I hope in the next year dgud can say something here.