Personal opinion,boat still looks a bit small,and I find that (although natural)white sand can look like salt/suger/snow. Some seaweed or seashells would help with the sub-conscious clues,but I'd prefer yellow sand. As for 'size' I have found 'instinct' is a worthy guide. If a pic looks wrong,it is usually your instinct telling you (though not always 'what')If it looks right,it may be,if it doesn't,keep changing,till it 'feels right.Don't forget to stand back,distance can help,so can 'Full-screen' viewing. Good Luck