PHASE 1: VISUAL DECONSTRUCTION - **Fabric Physics:** The source garment appears to be a lightweight woven fabric, likely a Viscose or Rayon blend given the fluid drape and relaxed structure. It has a matte finish with very low specularity (no high gloss). The simulation must treat the fabric as low-stiffness and high-pliability, allowing for soft, fluid folding rather than rigid creasing. - **Key Features:** - **Pattern:** High-frequency digital pixel camouflage (greens, blacks, lime). - **Collar:** "Camp" or "Cuban" collar style (open neck, notched lapel) which must lie flat against the upper chest/clavicle area. - **Closure:** Black button detail down the center placket. - **Silhouette:** Drop-shoulder design with elbow-length sleeves (distinctly longer than the user's current athletic tee). PHASE 2: FIT & DRAPE SIMULATION - **Body Mapping:** The target user has an athletic, muscular build (broad shoulders, tapered waist). The source shirt is an "oversized/relaxed fit." The simulation must *not* tight-fit the garment to the user's muscles. Instead, it must hang loosely from the shoulders, draping vertically over the pectorals and latissimus dorsi, creating air gaps between the fabric and the midsection. The shoulder seams should fall past the user's natural deltoid curve to replicate the drop-shoulder cut. - **Occlusion Handling:** - The user's pose is open with arms extended away from the torso; occlusion complexity is low. - **Critical Layering:** The user's neck and clavicle area must be properly masked to appear *behind* the open camp collar. - The new longer sleeves (elbow-length) will cover the user's biceps; ensure the user's forearms emerge naturally from the wider sleeve opening without clipping. PHASE 3: ENVIRONMENT & LIGHTING - **Light Match:** The user image features soft, high-key studio lighting with a dominant light source coming from the upper-left (indicated by highlights on the forehead and right shoulder). The new garment must generate self-shadowing (folds, armpits) consistent with this direction. A cast shadow from the collar onto the user's chest is required to ground the garment. - **Color Calibration:** The target environment has a warm, yellow/peach background. The green tones of the digital camo must be color-graded slightly warmer to match the ambient light temperature of the user's scene, ensuring the black pixels in the camo do not look like "voids" but rather dark fabric reacting to soft light. PHASE 4: IDENTITY PROTECTION - **Facial Lock:** Absolute pixel preservation required for the user's head, including hair, ears, jawline, and neck structure above the clavicle. - **Body Integrity:** Strictly forbidden to slim the user's muscular arms or torso. The simulation must modify the *garment* to accommodate the user's shoulder width, not shrink the user to fit the shirt. The user's skin tone on the visible forearms and hands must remain unaltered.