PHASE 1: VISUAL DECONSTRUCTION - **Fabric Physics:** The source garment is a heavyweight cotton-fleece blend (hoodie material). Unlike the user's current lightweight jersey t-shirt, the simulation must account for material thickness (~300-400 gsm). The surface should be matte with high light absorption, showing soft, diffuse highlights rather than sharp specular reflections. - **Key Features:** - The central "MOTORSPORT" chest typography and horizontal stripes must be preserved but warped to match the user's bust volume. - The vertical zipper mechanism must align with the user's midline. - Large graphic elements on the sleeves ("RACING TEAM" and star motifs) are critical and must be visible on the outer arms. - Ribbed elastic cuffs and bottom hemline structure must remain distinct from the main body fabric. PHASE 2: FIT & DRAPE SIMULATION - **Body Mapping:** - **Pose Interaction:** The user has arms crossed/folded across the midsection. The physics engine must calculate significant compression folds and cloth bunching at the inner elbows and where the forearms press against the torso. - **Volume & Gravity:** The hoodie is an oversized fit. It should not cling tightly to the waist; instead, it should hang loosely over the hips, likely extending lower than the current red t-shirt, creating a natural overhang above the pink trousers. The hood geometry needs to be simulated resting flat against the upper back/shoulders behind the neck. - **Occlusion Handling:** - **Hands & Skin:** The user's hands and wrists are visible and overlapping the garment area. A rigorous segmentation mask is required to layer the user's skin *over* the new hoodie sleeves. - **Hair:** The user's hair is pulled back, minimizing neck occlusion, but the neckline boundary must remain sharp against the neck skin. PHASE 3: ENVIRONMENT & LIGHTING - **Light Match:** The user is in an indoor environment with a primary light source coming from the left (curtain side). The new garment must exhibit brighter, cooler highlights on the left shoulder and sleeve, grading into deeper shadows on the right side (facing the brick wall). - **Color Calibration:** The source hoodie is a cool navy blue. It must be color-graded to match the warmer, slightly yellow ambient temperature of the user's room. The white graphics on the hoodie should be tinted slightly warm/cream to avoid looking artificially bright or superimposed. Shadows beneath the crossed arms must be darkened to ground the garment. PHASE 4: IDENTITY PROTECTION - **Facial Lock:** Absolute pixel preservation required for the user's entire head region, including the hairline, facial structure, bindi, and neck skin. - **Body Integrity:** Strictly prohibit any warping that slims the user's figure. The simulation must respect the user's natural shoulder width and arm volume. The bulk of the hoodie should be *additive* to the user's silhouette, not subtractive.