Intricately detailed and hyper-realistic 4k portrait of a woman at a Venetian carnival, adorned with an exquisite fox mask that captures the essence of mystery and allure. Her long, flowing blond hair cascades gracefully around her shoulders, its golden hues complementing the elaborate, oil painting-like richness of her attire. The mask, with its delicate whiskers and subtly expressive eyes, adds an enigmatic charm to her serene expression. Behind her, the vibrant colors and intricate patterns of the bustling carnival can be seen, enhancing the vivid storytelling of the scene. Her attire blends traditional elegance with hints of modern flair, elevating the portrait to an immersive work of art.