I made this with Vue 9.5xStream and edited this with Photoshop. I gave it some Blurr for a more realistic look, add some more clouds and some birds. Overall I really like the bright colours and the water.
Looks nice and dreamy, I think the sand level does go too far up (judging by the size of those trees it seems like the beaches would be really huge...and steep ) A much narrower beach around the very edge and the rest mostly covered in vegetation would look more realistic for a terrain that seems pretty steep (islands covered in mostly sand are usually very flat and not so hilly )