PHASE 1: VISUAL DECONSTRUCTION - **Fabric Physics:** The source garment appears to be a lightweight Viscose, Rayon, or soft Cotton blend. It possesses a high drape coefficient (fluidity) and a matte finish with very low specularity. It behaves differently than the user's current tight-knit wool/cotton turtleneck; it will not cling to musculature but rather hang loosely from the shoulder points. - **Key Features:** - **Camp Collar (Cuban Collar):** The open-neck V-shape structure is critical and replaces the user's current high turtleneck line. - **High-Contrast Pattern:** The white floral/botanical motifs on the black background must retain their sharp edges and not blur during warping. - **Left Chest Pocket:** Pattern matching on the pocket needs to be preserved. - **Button Placket:** Visible black buttons must align with the center torso line. PHASE 2: FIT & DRAPE SIMULATION - **Body Mapping:** - **Neckline & Arms (Generative Requirement):** The source is short-sleeved and open-necked, while the target is wearing a long-sleeved high-neck. The simulation must generate realistic skin texture for the user's exposed neck, upper chest, and forearms, removing the existing black sleeves and turtleneck collar. - **Volume:** The shirt fits "boxy" and relaxed. It must not conform tightly to the user's pectorals or abdominals like the current turtleneck. It should hang vertically from the deltoids, creating a slight gap between the fabric and the waist. - **Occlusion Handling:** - **Hands & Wrists:** The user's clasped hands and wrists are positioned at the solar plexus/mid-torso. This is a **hard occlusion**. The floral shirt must be rendered *behind* the hands and wrists. - **Shadow Interaction:** The shirt fabric must cast contact shadows onto the user's wrists where they touch the stomach area. PHASE 3: ENVIRONMENT & LIGHTING - **Light Match:** - **Source-to-Target Conversion:** The user image is a high-contrast Black & White studio shot. The colored source garment must be desaturated to grayscale. - **Lighting Direction:** The user is lit by a soft key light from the upper right (viewer's left), creating deep shadows on the left side of the body. The floral print must reflect this: bright highlights on the right chest/shoulder, deep shadows in the folds on the left side. - **Color Calibration:** - **Black Level Matching:** The black background of the floral shirt must be curve-adjusted to match the deep blacks of the user's trousers and hair to ensure the outfit looks cohesive. - **Contrast:** The white floral print must be punched up in contrast to match the sharp, dramatic lighting style of the user photo. PHASE 4: IDENTITY PROTECTION - **Facial Lock:** The user's face, hair, and jawline must remain pixel-perfectly frozen. The "mask" for preservation extends down to the jawline but excludes the current turtleneck collar. - **Body Integrity:** - **Silhouette Preservation:** While the shirt adds volume, the user's broad shoulder width and posture must remain unchanged. Do not slim the waist or alter the skeletal structure of the clasped hands. - **Skin Tone Consistency:** The generated skin for the forearms and neck (exposed by the new shirt style) must perfectly match the grain, noise, and lighting value of the user's face.