PHASE 1: VISUAL DECONSTRUCTION - **Fabric Physics:** The source garment is a medium-weight knit sweater (likely cotton or wool blend). Unlike the user's current thin jersey t-shirt, this material has significant thickness and structure. It has a matte finish with high light absorption and low reflectivity. The physics engine must simulate "heavy drape" rather than "clingy stretch." - **Key Features:** The central Teddy Bear graphic (with its own specific texture/embroidery) must be preserved without distortion. The ribbed crew neckline, ribbed cuffs, and the ribbed bottom hem are structural necessities. The drop-shoulder seam placement must be maintained to keep the oversized/relaxed aesthetic. PHASE 2: FIT & DRAPE SIMULATION - **Body Mapping:** Due to the user's forward-leaning pose against the balcony ledge, the sweater must hang vertically due to gravity, pulling slightly away from the lower abdomen/waist area, creating a "curtain" effect rather than hugging the skin. The fabric will bunch significantly at the armpits and inner elbows due to the extended arm position. The collar should sit higher on the neck than the current t-shirt. - **Occlusion Handling:** The primary occlusion is the balcony wall; the bottom hem of the sweater may partially rest on or hang over the wall/ledge depending on length. The user's hands are interacting with the wall and are effectively "outside" the torso zone, but the wrist area needs careful blending where the ribbed cuffs meet the user's forearms. PHASE 3: ENVIRONMENT & LIGHTING - **Light Match:** The user is in harsh, high-contrast natural daylight (sunlight coming from the upper left). The source garment currently has soft, diffuse studio lighting. The simulation must apply hard shadows to the right side of the torso (user's left) and under the armpits. The texture of the knit must show high-contrast micro-shadows to prove it is in sunlight. - **Color Calibration:** The source brown is dark and saturated. In the target environment, the sunlit areas of the sweater must be desaturated and brightened (washed out by sun), while the shadowed areas must be nearly black/deep cool brown to match the ambient contrast of the user's jeans and skin. PHASE 4: IDENTITY PROTECTION - **Facial Lock:** The user's entire head, including the specific hairstyle, jawline, neck musculature, and sunglasses, must remain frozen pixel-perfect. - **Body Integrity:** The user has a muscular build. Do not slim the torso or arms. Instead, add volume to the silhouette, as the sweater is thicker than the original t-shirt. The user's skin tone on the exposed forearms must remain unchanged.