Working on about 4 renders today.
Put a second sun in this one to see the marvelous displacement on the stone cube obj.that is part of the file share.
If you know how to model, you can take out the windows and give them a separate texture. I did, and made them into glass.
The fishing ship model is UV wrapped with a single image. In the object file there is a dummy file with each texture for each going to the map. The object is very complex, (pulleys, cables, poles, windows,) in addition to the body of the ship itself, now triangulated; so I may try to delete the texture and try to texture it all over again in edit mode. I do not mind the learning experience, unless there is a simpler method to tear apart the single UV image.