A 4K ultra-realistic, photorealistic portrait of a female AI model, indistinguishable from a real person. She has long voluminous hair cascading over her right shoulder with natural density, layered waves, and neatly styled baby hairs. Her full lips are parted slightly with nude gloss. Her contoured cheekbones have subtle blush undertones. Defined brows frame her eyes, which gaze toward the camera with soft intensity, highlighted by soft glam lashes catching shadow contrast. Her chin is tilted down slightly. She is reclined, her upper torso leaning into the light with shoulders angled. Her right arm is relaxed under a white duvet, which is partially draped over her left arm and side, showing sharp folds. She wears a black lace lingerie bodysuit with a sheer mesh midsection, featuring realistic fabric texture and stitching and thin straps resting on her shoulders with natural indentation on the skin. A silver chain necklace reflects thin highlights across her collarbone. She has glossy nude nails. The setting is a bedroom with a blurred tufted gray headboard and white bedding beneath, showing natural creases and wrinkles. Harsh late-afternoon sunlight cuts through horizontal blinds, casting strong diagonal light-and-shadow stripes across her face, chest, and the duvet. The light bands are sharp and high contrast with visible gradation on edges. The high-contrast shadows are deepened against the duvet and background. Shot on a Canon EOS R5 with a Sigma Art 85mm f/1.4 lens at f/1.4, ISO 100