PHASE 1: VISUAL DECONSTRUCTION - **Fabric Physics:** The source garment is a woven cotton or linen blend with a matte finish. It possesses medium stiffness—holding structure at the collar and placket—but drapes softly without rigid creasing. It has low specularity (does not reflect light sharply) and should absorb the ambient warm light of the target environment rather than shining. - **Key Features:** The mustard yellow base color with the specific floral/paisley block print (red, blue, and teal motifs) must be preserved without distortion. Essential construction details include the camp collar, the cuffed elbow-length sleeves with button tabs, the visible front placket with contrast buttons, and the slightly boxy, cropped hemline. PHASE 2: FIT & DRAPE SIMULATION - **Body Mapping:** Due to the user's seated, slightly forward-leaning pose, the fabric must exhibit horizontal tension folds across the mid-torso/stomach area. The garment is a looser fit than the user's current black shirt; it should hang with a relaxed silhouette, not clinging tightly to the waist. The hemline is cropped and should likely terminate just above or at the waistband of the jeans, potentially lifting slightly at the back due to the seated posture. - **Occlusion Handling:** 1. **Hair:** The user's long dark hair flows over the left shoulder (viewer's right) and behind the back. This hair mask must be segmented and layered *over* the new collar and shoulder of the yellow shirt. 2. **Accessories:** The white wristwatch on the left wrist is likely below the new sleeve line, but if the sleeve extends, the watch acts as a hard occlusion. 3. **Bag & Hands:** The white shoulder bag and its strap in the lap interact with the lower hem. The garment must settle *behind* the bag and the user's hands. PHASE 3: ENVIRONMENT & LIGHTING - **Light Match:** The target environment features strong, warm, directional "golden hour" sunlight coming from the back-right. The new garment must simulate this back-lighting (rim light) on the right shoulder and arm. The front of the shirt requires soft, warm fill lighting, while deeper shadows must be cast on the user's right side (viewer's left) and under the collar/lapels. - **Color Calibration:** The source garment's cool/neutral studio lighting must be temperature-shifted. The mustard yellow needs to take on a warmer, golden hue to integrate with the sunset ambiance. Contrast needs to be increased to match the dynamic range of the outdoor scene. PHASE 4: IDENTITY PROTECTION - **Facial Lock:** Absolute freeze on the facial region, specifically the eyes, glasses frames, nose, mouth, and jawline. The hairline where it meets the forehead must remain untouched. - **Body Integrity:** The user's skeletal structure (shoulder width, arm thickness) must not be altered. The generated skin on the forearms (since the new sleeves are shorter than the current long sleeves) must match the user's skin tone exactly. Explicitly forbidden to slim the torso or alter the curvature of the legs in the jeans.