PHASE 1: VISUAL DECONSTRUCTION - **Fabric Physics:** The source garment is a lightweight cotton jersey knit (tank top). It possesses a matte finish with high pliability and low bending stiffness. Unlike the user's current rigid synthetic puffy jacket, this material must demonstrate soft micro-wrinkles and conform closely to the torso's curvature without retaining volume. - **Key Features:** The central white typography ("VACATION MOOD") and the distressed tree graphic block must remain centered on the chest, deforming naturally with the body's rotation. The crew neck binding and the specific deep-cut armhole hems are structural constraints that define the silhouette. PHASE 2: FIT & DRAPE SIMULATION - **Body Mapping:** The user is currently wearing a high-volume winter jacket which masks the true torso topography. The simulation must estimate the underlying body surface (removing the jacket's bulk) to properly drape the tank top. Given the 3/4 stance, the fabric must drape vertically from the shoulders, pulling slightly across the chest towards the user's left armpit due to the torso twist. - **Occlusion Handling:** The user's hands are positioned near the mid-torso, appearing to grip the current jacket. These hands must be segmented and layered *over* the new tank top. The blue beanie is a hard boundary; the garment replacement must stop strictly at the neck base, ensuring the beanie and beard obscure the collar line where appropriate. *Note: Since the new garment is sleeveless and the user is wearing long sleeves, generative in-painting is required to render the exposed arms.* PHASE 3: ENVIRONMENT & LIGHTING - **Light Match:** The target environment utilizes soft, cool, diffuse outdoor lighting (likely overcast or dusk), contrasting with the source's warm, flat studio lighting. The tank top's shading must be recalculated to reflect a soft ambient occlusion, with subtle shadows cast by the user's beard and chin onto the upper chest. - **Color Calibration:** The source garment's bright mint/pistachio green must be desaturated and slightly cooled (shifted toward blue-cyan) to integrate with the moody, low-contrast color grading of the target image. The white lettering should not be pure white but matched to the brightness of the existing white sweater visible under the jacket. PHASE 4: IDENTITY PROTECTION - **Facial Lock:** The user's entire head region, including the blue beanie, facial structure, eyes, and beard, must remain pixel-perfectly frozen. - **Body Integrity:** While the silhouette will naturally reduce in volume by removing the puffy jacket, the underlying biomechanical structure (shoulder width, neck thickness) must be preserved. Do not slim the user's actual anatomical frame to match the source model's physique.