PHASE 1: VISUAL DECONSTRUCTION - **Fabric Physics:** The source garment is a cotton jersey knit (tank top). It possesses medium weight with moderate elasticity. Unlike the stiff black t-shirt currently worn, this material creates softer, smaller folds. It has a matte finish with very low specular reflection; it should absorb light rather than shine. - **Key Features:** The central "NORTH CAROLINA 88" white graphic print with its specific distressed texture must be preserved and warped correctly over the chest volume. The white ribbed piping/binding around the neckline and armholes is a critical structural boundary that must remain distinct from the red body. PHASE 2: FIT & DRAPE SIMULATION - **Body Mapping:** Due to the sitting position and slight forward hunch, the tank top will bunch significantly at the lower abdomen and hip lap. The neckline should sit lower than the current t-shirt crew neck. Crucially, since the source is sleeveless and the target is wearing short sleeves, the simulation must generate accurate skin texture for the user's exposed deltoids and upper arms where the black sleeves currently exist. - **Occlusion Handling:** The user's right forearm and hand are crossing the midsection. The red tank top must be rendered strictly *behind* this arm. The shadow cast by the right arm must be projected onto the new red fabric. The black t-shirt underneath must be fully masked out. PHASE 3: ENVIRONMENT & LIGHTING - **Light Match:** The scene utilizes diffuse outdoor daylight, likely overcast or in shadow (soft ambient occlusion). The light source appears to be coming from above and slightly to the right. The red fabric must exhibit self-shadowing in the fold creases near the stomach and deeper shadows under the armpits. - **Color Calibration:** The source image is high-contrast studio lighting. The red value must be slightly desaturated and shifted cooler to match the "dusty" aesthetic of the blue wall and outdoor environment. It requires a grain overlay to match the noise level of the low-resolution target photo. PHASE 4: IDENTITY PROTECTION - **Facial Lock:** The user's hair, ear, beard, and profile angle are frozen. The neck connection point must be blended seamlessly, preserving the user's skin tone. - **Body Integrity:** Strictly forbidden to slim the waist or alter the shoulder width. The natural fold of the stomach caused by the sitting posture must be maintained underneath the new fabric to ensure physics fidelity. The volume of the arms (now bare) must match the volume implied by the original t-shirt sleeves.