PHASE 1: VISUAL DECONSTRUCTION - **Fabric Physics:** The source garment is a heathered cotton-fleece blend sweatshirt. It possesses a high weight-to-drape ratio, meaning it is semi-rigid and will not cling tightly to the muscles like the current thin henley. It has a matte finish with low specular reflection; light should diffuse across the surface rather than shine. - **Key Features:** The central chest graphic ("Authentic Terrain Jeanswear" with red/black embroidery/print) must remain centered on the sternum despite the crossed-arm pose. The rib-knit crew neck collar, cuffs, and hem must retain their elastic texture. The "heathered" (speckled) texture of the pink fabric must be preserved to maintain realism. PHASE 2: FIT & DRAPE SIMULATION - **Body Mapping:** Due to the crossed-arms pose, the simulation must calculate high tensile stress across the upper back and shoulders. Significant compression folds and deep creasing must be generated at the inner elbows where the arms fold. The chest graphic will likely experience slight horizontal distortion or vertical folding due to the pressure of the forearms against the chest. The hemline should not hang perfectly flat but rather bunch slightly above the waist due to the user's leaning posture. - **Occlusion Handling:** This is a high-complexity occlusion scenario. The user's hands (both left and right), fingers, and the black smartwatch on the left wrist must be masked and layered *strictly over* the new sweatshirt. The right shoulder/arm is in contact with the tree bark; the garment physics must react to this collision, flattening slightly against the wood rather than clipping through it. PHASE 3: ENVIRONMENT & LIGHTING - **Light Match:** The target environment features high-contrast, directional natural sunlight filtering through trees (dappled lighting), coming from the upper right. The pink sweatshirt must cast self-shadows where the arms cross over the torso. The bright, flat studio lighting of the source image must be replaced with this dynamic, warm outdoor lighting, creating highlights on the right shoulder and deep shadows on the user's left side. - **Color Calibration:** The source garment's salmon/pink hue needs to be color-graded to match the warmer, golden temperature of the forest setting. Desaturate the pink slightly to account for atmospheric scattering and apply a subtle greenish color cast in the shadowed areas to simulate light bouncing off the surrounding foliage. PHASE 4: IDENTITY PROTECTION - **Facial Lock:** The user's entire head, neck, and skin tone must remain frozen pixel-for-pixel. The transition from the new crew neck to the user's existing neck skin must be seamless. - **Body Integrity:** Zero tolerance for body warping. The user's shoulder width, arm thickness, and torso volume must be preserved. While the sweatshirt adds material thickness, the underlying skeletal mesh must not be slimmed or altered to fit the clothing.