(Masterpiece, 8k, photorealistic, extremely high detail, sharp focus), full body shot of a stunningly beautiful nude woman in her late 20s. She is sitting provocatively on a large, wet, brown boulder within a sunlit rock waterfall. Her body is slender and toned, with smooth, glistening skin covered in water droplets. She has small, perky breasts with firm, pinkish-brown nipples. Her long, dark hair is soaking wet, clinging to her shoulders and back. She gazes directly at the camera with a lustful, seductive expression, her lips slightly parted. Her legs are spread wide open, her right leg is raised and bent, resting on a higher rock, while her left foot touches the splashing water below. The most explicit detail is her right hand, which is nestled between her thighs, her fingers actively spreading her glistening, pink inner labia, offering a completely uncensored, open view of her vulva. The setting is a natural grotto during the golden hour, sunlight streams down, illuminating the cascading water and creating sparkling highlights on her wet skin and the surrounding rocks. The background shows lush green foliage at the top. Cinematic lighting, shot on a DSLR with a 50mm f/1.4 lens, shallow depth of field.