Enjoy a set of 4 large ocean planes for Daz Studio and Poser. Big oceans are tricky, as either you have to deal with massive amounts of faces and memory, or low quality. These oceans are designed for both detail and scope.
The closest, center piece is higher in polygons, while each circle around it gets more and more low poly, in order for it to reach all the way into the far distance. That way, you will have both quality and size. Of course, this is best for still renders, as if you try to fly over it, you will notice the lower resolution further away. But for stills, you will get optimum results!