masterpiece illustration low shot closeup 1 child sitting on sand cheerful expression adorable face highly detailed big eyes pigtails golden hair building a sandcastle with a plastic bucket dramatic lighting sunlight with lens flare beach surroundings seashells marine life 16k UHD HDR vivid colors clear sky delightful atmosphere playful mood serene scenic environment youthful innocence captivating joy edited to avoid cloned features maintain natural look realistic hand proportion no cropping ensure high-resolution remove any text or artifacts pure visual harmony embrace uniqueness in artistry and setting