PHASE 1: VISUAL DECONSTRUCTION - **Fabric Physics:** The source garment appears to be a textured, medium-weight cotton or flannel blend with a "frayed" or "eyelash" thread weave. It has a matte finish with high surface friction. It should not reflect light like synthetic nylon; instead, the texture should trap light, creating micro-shadows within the frayed threads. - **Key Features:** 1. **Surface Texture:** The vertical and horizontal "distressed" thread fringes are the defining feature and must be rendered with depth, not flat pixels. 2. **Pattern:** The brown, beige, and white plaid alignment must wrap correctly around the torso. 3. **Hardware:** The buttons (appear to be wood or brown plastic) need to retain their slight sheen. 4. **Removal:** The black rectangular hang-tag and price tag visible on the collar must be digitally removed during transfer. PHASE 2: FIT & DRAPE SIMULATION - **Body Mapping:** 1. **Volume Adjustment:** The user is currently wearing a puffy/padded jacket. The simulation must estimate the thinner underlying torso shape to prevent the shirt from looking artificially bloated or "pumped up." 2. **Profile Drape:** Since the user is in a side profile, the shirt's side seam must be generated. The pattern needs to wrap from the chest to the back naturally without stretching the plaid check distortions. 3. **Sleeve Tension:** The arm is bent forward. The fabric should exhibit tension creases at the inner elbow and across the shoulder blade. - **Occlusion Handling:** 1. **Hand Interaction:** The user's hands are currently hidden inside the jacket pockets. Since a standard shirt lacks these specific pockets, the simulation must infer the hand position as being in the *pant* pockets. Consequently, the shirt hem and lower sleeve should drape over the wrist/hand bulge at the waistline. 2. **Jawline:** The user's beard and jawline overlap the collar area; the new collar must sit *behind* the beard/chin. PHASE 3: ENVIRONMENT & LIGHTING - **Light Match:** The user is in a room with cool, diffuse, overhead lighting (likely white LED), contrasting with the warmer/natural light of the cloth image. The shirt's color temperature needs to be cooled (shifted slightly blue/neutral) to match the grey/silver tones of the room. - **Color Calibration:** The brown tones of the shirt must be desaturated slightly to avoid looking jarringly vibrant against the muted grey wardrobe and curtains. Shadows should be soft and cast downwards and slightly to the left of the image (user's back side) based on the room's ambient occlusion. PHASE 4: IDENTITY PROTECTION - **Facial Lock:** The user's entire head, including the specific hair shape, ear, facial skin tone, and beard, must be completely frozen and untouched. - **Body Integrity:** While the *bulk* of the puffer jacket is removed, the user's shoulder width and posture must remain consistent. Do not slim the legs or alter the stance of the lower body (black trousers). The boundary where the shirt meets the pants must be seamless.