PHASE 1: VISUAL DECONSTRUCTION - **Fabric Physics:** The source garment appears to be a medium-weight woven cotton or linen blend. It has a matte finish with high structural integrity, meaning it will not cling like jersey but rather bridge over body contours. It absorbs light rather than reflecting it; therefore, specular highlights should be minimal/non-existent. - **Key Features:** The vertical panel stitching (princess seams) running down the front torso is a critical structural detail. The single left chest pocket, the front button placket, the classic pointed collar, and the roll-tab details on the 3/4 length sleeves must be preserved. The curved hemline must be maintained. PHASE 2: FIT & DRAPE SIMULATION - **Body Mapping:** Due to the user's pose (leaning back against a railing with arms spread), the garment must drape backwards slightly. Gravity will pull the fabric towards the user's back, likely causing the front hem to lift slightly away from the jeans. The fabric must bunch significantly at the inner elbows, particularly on the user's left arm which is bent. Tension lines should appear across the chest/shoulder area extending toward the outstretched right arm. - **Occlusion Handling:** The metal railing runs horizontally across the lower torso. The new garment must be masked *behind* the railing and *behind* the user's hands/wrists resting on the bar. The user's hair is pulled back, simplifying the neck area, but the collar must sit naturally around the neck base without intersecting the jawline. PHASE 3: ENVIRONMENT & LIGHTING - **Light Match:** The target environment is a large indoor atrium with diffuse, multi-source lighting (overhead structure and background windows). The lighting is relatively flat but slightly top-down. Shadows on the new garment should be soft and diffuse, appearing primarily under the collar, inside the sleeve cuffs, and beneath the bust. - **Color Calibration:** The source garment is studio-lit (neutral/cool white). The target scene has a warmer, mixed-temperature ambient light (mall lighting). The beige tone of the shirt must be color-graded slightly warmer (shifted toward yellow/orange) to match the ambient environment and ensure it doesn't look like a "cut-and-paste" sticker. PHASE 4: IDENTITY PROTECTION - **Facial Lock:** Absolute preservation of the user's face, including eyes, nose, mouth, chin, ears, and the hairline. The neck skin tone must match the face perfectly. - **Body Integrity:** Strict prohibition on warping or slimming the user's torso. The source garment (which is on a slim mannequin) must be virtually resized to fit the user's actual bust and waist measurements, maintaining her natural silhouette and volume. The position of the arms and the width of the shoulders must remain untouched.