PHASE 1: VISUAL DECONSTRUCTION - **Fabric Physics:** The source garment is a lightweight cotton jersey (vest/tank top). It features a matte finish with low light reflectivity. The simulation must treat the material as pliable and soft, reacting readily to gravity rather than holding a rigid shape. It should not exhibit the specular highlights seen on the user's current synthetic puffer jacket. - **Key Features:** The specific graphic print (black "grunge" scatter pattern) and the central typography ("HARD CLUB", "COME OUT" text blocks) must be preserved without distortion. The yellow ribbing around the deep U-neckline and large armholes is a critical structural boundary that must remain distinct. PHASE 2: FIT & DRAPE SIMULATION - **Body Mapping:** The source garment is sleeveless and loose-fitting, contrasting significantly with the user's current bulky puffer jacket. The simulation must estimate the user's underlying torso shape to replace the volume of the jacket with the closer-fitting tank top. The fabric should hang vertically from the shoulders, draping slightly loosely around the midsection due to the user's seated or leaning stance. Since the user is turning his torso, the fabric should show slight torsion wrinkles across the chest. - **Occlusion Handling:** The user's hands are currently positioned mid-torso, gripping the existing jacket. These hands must be segmented and layered *over* the new yellow tank top. *Critical Note:* Because the source is sleeveless and the target is wearing a long-sleeved jacket, the system must generatively in-paint the user's arms and shoulders using skin tones sampled from the face to fill the void left by the removed jacket sleeves. PHASE 3: ENVIRONMENT & LIGHTING - **Light Match:** The user is in an outdoor environment with soft, diffuse, cool-toned lighting (overcast sky). The bright, warm studio lighting of the yellow source garment must be neutralized. The yellow intensity should be slightly desaturated and cooled to match the ambient blue/grey environmental light. - **Color Calibration:** Shadows on the garment should be soft and diffuse, following the existing lighting on the user's face (top-down, slight left-to-right bias). There should be no harsh cast shadows, only ambient occlusion where the fabric folds or meets the skin/hands. PHASE 4: IDENTITY PROTECTION - **Facial Lock:** The user's entire head region—including the blue beanie, forehead, eyes, nose, mouth, and full beard—must be frozen and pixel-preserved. The neck area above the clavicle should also remain untouched. - **Body Integrity:** The user's perceived body mass must be maintained; do not slim the torso to match the mannequin. The generated skin for the exposed arms and shoulders must strictly match the user's facial complexion and dermatological texture.