A hyper-detailed, photo-realistic 4k portrait of a woman at the Venetian carnival, wearing an intricately designed fox mask adorned with delicate gold filigree and vibrant red accents. Her piercing blue eyes peer through the mask, surrounded by elegantly painted face details. She has long, flowing blond hair cascading in soft waves over her shoulders, shimmering with a golden sheen under the warm sunlight. The setting is alive with the lively atmosphere of the carnival, characterized by a blur of colorful costumes and ornate masks in the background. The style reflects an oil painting, with rich textures and deep, lush colors adding to the depth and realism of the image, capturing the essence of mystery and elegance associated with the Venetian carnival.