Use the attached image as facial reference. Preserve the model's exact face, skin tone, bone structure and features accurately throughout.
CONCEPT: A glass prism on a white surface splits a single shaft of direct sunlight into a full spectrum — the rainbow falls across a woman wearing an all-white outfit. The prism itself is visible and sharp. The spectrum it casts is physically accurate: red through violet in clean distinct bands. The rainbow falls across her white fabric, her bare arms, and reaches her face. The white fabric becomes the canvas for the spectrum — every color visible against the pure white ground. POSE: She reclines on a white linen surface — a daybed or low platform — in a naturally elegant position. Her body at a 30-degree angle to the camera. Her left arm extended along the daybed surface, her right hand resting on her waist. Her face turned toward the camera, eyes slightly closed as if feeling the warmth of the light. The rainbow spectrum falls diagonally across her body — entering at her extended left hand, crossing her torso, and reaching her face. Expression: complete surrender to the warmth and color of the light. Still. Luminous. She wears an all-white look — a simple white silk wide-leg trouser, a white silk camisole top. Everything white, everything simple — the white is the canvas for the spectrum. Bare feet. Minimal gold jewelry — a thin gold chain at the neck, small gold studs. Hair loosely braided over one shoulder. THE PRISM AND SPECTRUM: A large triangular glass prism — 15cm on its longest side — positioned on the white surface near her extended left hand. A single shaft of direct bright sunlight enters through a window off-frame to the left and strikes the prism's face at the precise angle to create maximum spectrum dispersion. The spectrum emerges from the prism's far face and falls across the scene in real rainbow order — red closest to the prism, then orange, yellow, green, blue, indigo, violet — each band approximately 3-4cm wide, each band sharp-edged. The spectrum crosses her extended left hand, her forearm, her white camisole, her torso, and reaches her face — the violet end at her jawline. Each color band is clearly distinguishable on the white fabric. LIGHT: The direct sunlight shaft is the primary light source — entering from the upper left, striking the prism, and continuing as the spectrum. The spectrum itself provides soft colored light on her skin and white fabric. The rest of the scene: bright natural window light from the same direction, even and warm. Her face: warm natural daylight, the violet end of the spectrum falling just across her jaw and neck. The white fabric reads every spectrum color with perfect fidelity — each band glows its own color against the white ground. CAMERA: 85mm, camera at bed level at a 30-degree angle to her body axis — looking slightly down at her reclining form. Her full body from extended left hand to face in frame. The prism visible at the left frame edge, the spectrum crossing her body in a diagonal rainbow. Her face in the upper right of the frame, the last band of violet touching her jaw. Ultra-photorealistic.
The spectrum must be physically accurate — correct color order, correct band widths, correct behavior on white fabric. Her skin and white silk must render with complete photographic realism. Color grade: pure white base, full natural spectrum falling across it, warm natural daylight. 85mm, f/3.5, film grain. 4:5.
