Ciao VonDos, well done!
That stern section starts resembling the real thing at last, though I would make the bended profile of each deck aft (between the ladders) a bit narrower and more flat.
As to the shadowing problems in the hull, in my experience they might be caused by twisted surfaces (though in your case I dont think this is the problem), or by wrong smoothing groups. To the best of my knowledge SH's 3D format doesnt support smoothing groups (i.e. if you have any in your obj meshes, they are ignored when S3d imports them into a dat file), but edges/vertices get split along the perimeter of each UV mapped area, thus behaving as "hard edges". The solution would be welding one or more UV mapped areas where unwanted sharp shadows are rendered in game, before you import your model in S3d. Getting shadows right without distorting too much the UV map might take some time, but it shouldnt be too complicated either
