PHASE 1: VISUAL DECONSTRUCTION - **Fabric Physics:** The source garment appears to be a soft synthetic blend, likely polyester crepe or a matte satin. It has a fluid drape with moderate weight—heavier than the user's current ribbed tank but lighter than canvas. It exhibits low-to-medium specularity (soft sheen, not glossy). The shoulders have slight structural gathering (puff sleeves) which implies stiffness at the seam. - **Key Features:** The emerald green hue, the contrasting thick black V-neck placket (neckline trim), and the matching black cuffs at the wrists are critical design elements. The subtle gathering/pleating at the shoulder cap and the loose fit through the torso must be preserved. PHASE 2: FIT & DRAPE SIMULATION - **Body Mapping:** Due to the user's raised right arm (hand behind head), the garment must exhibit significant axillary tension (stretching from the armpit to the waist) on the right side. The right sleeve will slide down towards the elbow due to gravity, causing bunching at the shoulder/upper arm. The left arm is bent at the hip; the left sleeve should bunch at the inner elbow (antecubital fossa) and the cuff should rest near the wrist. The torso fit should be relaxed, not skin-tight, hanging vertically from the bust and bridging the gap at the waist where the user leans. - **Occlusion Handling:** The user's long, dark hair cascading over the right shoulder and chest is a critical occlusion layer; it must be segmented and composited *over* the new green fabric. The user's left hand (on hip) interacts with the hemline/hip area and must remain visible if the shirt length interferes. The watch on the right wrist will likely be covered by the long sleeve; if not, the sleeve must interact physically with it (bunching above it). PHASE 3: ENVIRONMENT & LIGHTING - **Light Match:** The target environment features bright, diffuse, cool-toned studio/room lighting (likely overhead LED), contrasting with the dimmer, warmer light of the source image. The green fabric must be relit to reflect a top-down light source, generating shadows beneath the bust and inside the fabric folds created by the bent arms. - **Color Calibration:** The source garment's warm/yellow cast must be neutralized. The green saturation needs to be calibrated to the high-key lighting of the target room to avoid looking muddy. The black trim must remain distinct from the user's black hair and black shorts. PHASE 4: IDENTITY PROTECTION - **Facial Lock:** Absolute pixel-lock on the user's face, neck structure, and jawline. The transition from the new V-neck collar to the skin must be seamless. - **Body Integrity:** Strictly forbid any volumetric changes to the user's hips, thighs, or waist. The new garment is looser than the original; the simulation must show the clothing hanging *off* the body, rather than warping the body to fill the clothing. Skin tone on the legs and face must remain unaltered.