Jim, what are those dark stripes on the hull? It's not a texture is it? Maybe a higher shadow map size would fix that? (Might want to do that anyway for the shadow the genua throws on the mainsail. That looks kinda poserish :-)) I'm thinking about two details you might want to add to the boat: Most of such boats I see have some sort of railing at the bow. Sometimes just a short one. I think it would look very good on this one. And for shots in the late afternoon or evening, like your second render, navigations lights might give a nice touch. Something I would try with the first picture is to play with the light intensity. Set it at 150% for example. I find that that can give the impression of a very bright and sunny day with the a bright sun shining. Poser renders always give me the impression that there is a cloud in front of the sun :-) Then again, maybe that is what you intended since the shadows are also quite soft?