PHASE 1: VISUAL DECONSTRUCTION - **Fabric Physics:** The source garment is a textured waffle-knit or thermal cotton blend. It possesses a matte finish with high light absorption and virtually no specular reflection. The physics engine must account for a medium-weight drape with moderate elasticity (stretch), meaning it will contour closer to the torso than the user's current rigid, oversized tee. - **Key Features:** The distinct "waffle" grid texture must be preserved at a high resolution to avoid looking like flat noise. The specific binding/ribbing around the scoop neckline and armholes is critical for structural realism. The sleeveless cut is the defining silhouette change. PHASE 2: FIT & DRAPE SIMULATION - **Body Mapping:** Because the user is switching from an oversized t-shirt (with sleeves) to a tank top (sleeveless), the simulation must generate accurate skin texture and muscle definition for the user's currently covered deltoids and biceps to match his visible forearms. The tank top straps must align with the clavicles, with the right strap elevating slightly to accommodate the raised right shoulder. The garment should hang closer to the ribs than the current shirt, reducing the visual volume of the torso. - **Occlusion Handling:** CRITICAL: The user's right hand and fingers are interacting with the neckline/chain. The new garment must be layered *under* the hand. The silver neck chain needs to be segmented and composited *over* the new black tank top neckline. The user's chin/beard line overlaps the collar area and must remain top-layer. PHASE 3: ENVIRONMENT & LIGHTING - **Light Match:** The target environment utilizes soft, high-key studio lighting with a neutral white balance. The black tank top must not render as "pure black" (void of detail); it requires soft, diffuse highlights on the texture ridges to match the ambient occlusion of the room. Shadows should fall downwards and slightly to the user's left, consistent with the shadow on the user's neck. - **Color Calibration:** The source image has a slightly warmer tone. Desaturate the black of the tank top slightly to match the cooler, sterile white background of the user image. Ensure the black levels match the contrast of the user's hair. PHASE 4: IDENTITY PROTECTION - **Facial Lock:** Absolute freeze on the user's face, specifically the downward gaze, jawline, short haircut, and stubble. - **Body Integrity:** Do not alter the user's shoulder width or chest volume. The visible tattoos on the left forearm must be preserved. Any generative in-filling of the upper arms (due to sleeve removal) must strictly match the user's existing skin tone and athletic build, forbidding any slimming effects.