This image is not nude but the way the swimsuit covers her body, there is little difference. Gorgeous model on the beach that is obviously not a scene that you would expect in much of the Gulf of Mexico now with the oil spill.
This image looks photoshopped. If it is a single exposure image, the photographer did a great job of balancing the front lighting but still capturing the rising (or setting) sun. Even if it has been post-processed, the view is spectacular!