PHASE 1: VISUAL DECONSTRUCTION - **Fabric Physics:** The source garment is a lightweight cotton jersey or cotton-blend tank top. It has a matte finish with very low reflectivity (high light absorption). The simulation must treat this as a soft, pliable material that follows gravity closely, unlike the user's current rigid, puffy jacket. - **Key Features:** The central graphic print ("THE MISRAGLEN MAFU NALIEE" with the mountain emblem) is the primary focal point and must be centered on the chest. The crew neckline ribbing and the raw/hemmed edges of the sleeveless armholes must be preserved. The garment is white, so texture mapping is crucial to prevent it from looking like a flat white shape. PHASE 2: FIT & DRAPE SIMULATION - **Body Mapping:** This is a complex transformation requiring the removal of the user's heavy winter puffer jacket. The simulation must estimate the user's underlying torso volume, which is significantly smaller than the jacket's silhouette. Since the source is sleeveless and the user is wearing long sleeves, the system must generatively inpaint natural skin texture and muscle definition for the user's arms to match their facial skin tone. The tank top should hang vertically from the shoulders, draping slightly looser around the waist due to the user's leaning pose. - **Occlusion Handling:** 1. **Left Hand:** The user's left hand is actively gripping the lapel of the current jacket. This hand must be masked and layered *over* the new tank top. The cloth simulation must slightly deform or wrinkle around the thumb and fingers to imply contact, ensuring the hand doesn't look like it is floating in mid-air. 2. **Railing:** The green metal railing in the foreground intersects the lower body; ensure the garment does not clip through this environmental object. PHASE 3: ENVIRONMENT & LIGHTING - **Light Match:** The scene is a nighttime urban environment with mixed lighting. There is a strong, likely cool-toned artificial light source coming from above/front-left (illuminating the user's face), and warm, yellow bokeh street lights in the background. The white tank top must reflect this: cool, bright highlights on the upper chest/shoulders, and deeper, noisier shadows towards the right side and bottom where light falls off. - **Color Calibration:** The "white" of the tank top must not be pure white (#FFFFFF). It requires color grading to match the ambient contrast of the photo—slightly desaturated with a blue/cyan cast in the highlights and grain added to match the high ISO noise of the target photograph. PHASE 4: IDENTITY PROTECTION - **Facial Lock:** The user's entire head (hair, forehead, eyes, nose, mouth, and jawline) must be rigidly frozen. The neck transition is critical; the mask must cut precisely where the current jacket's high collar ends and the neck begins. - **Body Integrity:** While the volume of the clothing will decrease significantly (puffer jacket to tank top), the user's underlying biological shoulder width and torso build must be preserved. Do not warp the user's body to match the slimmer frame of the source model; the tank top must expand to fit the user's actual proportions.