Sasha? First of all, I would suggest taking one of the many shapes in ‘Background’ and making it your sand color. You could mask a texture to it, translucent beiges would be my guess, once or multiple layers of more of the same shape turned transparent. (alpha = 0) Shape it or shade it as you like. Put a deep blue background under it for the water and make some seafoam probably out of near-translucent layers of hair in white for the edges. Layer it on. Good luck.