PHASE 1: VISUAL DECONSTRUCTION - **Fabric Physics:** The source garment is a white, ribbed cotton-blend tank top. It possesses high elasticity and matte texture. Unlike the user's current stiff lace tunic, this material must demonstrate tensile stretch across the bust and relaxed compression at the waist. Light interaction should be diffuse with no specular highlights (non-reflective). - **Key Features:** - The "GAP" logo is currently mirrored in the source image; it MUST be horizontally flipped to read correctly on the target. - The vertical ribbing texture of the fabric must be preserved to maintain scale. - The binding trim along the neckline and armholes must be distinct from the main bodice. - The U-shaped scoop neckline geometry must be maintained. PHASE 2: FIT & DRAPE SIMULATION - **Body Mapping:** - **Anatomy Inference (Crucial):** The target user is wearing long sleeves, but the source is sleeveless. The simulation must generatively reconstruct/inpaint accurate skin texture and tone for the user's upper arms and shoulders, matching the skin tone of her face and feet. - **Posture Dynamics:** Since the user is seated and leaning slightly forward, the tank top should exhibit transverse folding (horizontal wrinkling) across the mid-abdomen area. The hemline will naturally ride higher on the torso compared to a standing pose due to hip flexion. - **Occlusion Handling:** - **Hair:** The user's dark hair falling over both shoulders must be segmented and layered *over* the tank top straps. - **Hands/Legs:** The user's hands are clasped low on the knee. If the tank top length extends to the hip, the hands must occlude the fabric. The bottom hem must interact naturally with the waistline of the jeans, potentially bunching where the leg crosses. PHASE 3: ENVIRONMENT & LIGHTING - **Light Match:** The target environment utilizes cool, diffuse artificial light (likely fluorescent) with a blue color cast from the wall. The source image has strong purple/warm contamination. The white tank top must be color-corrected to remove the purple tint and balanced to a neutral cool white to match the target scene's white point. - **Color Calibration:** Shadows cast by the garment (on the skin) and onto the garment (from the hair/chin) must be cool-toned/grey, avoiding the reddish shadows present in the source image. PHASE 4: IDENTITY PROTECTION - **Facial Lock:** The user's face, specifically the jawline, smile, and hairline, must remain completely frozen. The neck transition area is the critical blend zone. - **Body Integrity:** Do not morph the user's torso to match the slimmer silhouette of the source model. The tank top must expand to fit the user's natural seated volume. The generative skin for the arms must respect the user's actual body mass index implied by her visible features, strictly forbidding digital slimming.