Create a realistic digital painting of Monkey D. Luffy from One Piece. He is a young pirate with a lean, muscular build, wearing his iconic straw hat with a red ribbon, an open red vest, blue shorts, and sandals. His expression should be determined and adventurous, with a wide grin showing his carefree nature. Include his signature scar under his left eye and a larger scar on his chest. The background should depict a bright, sunny ocean scene with clear blue skies, emphasizing the adventurous spirit of the character. The overall style should balance realism with the playful and vibrant essence of the original anime.