背景置換 スタジオ風 - AI写真加工プロンプト

Replace the background of the uploaded photo with a softly blurred professional photography studio backdrop in neutral light gray (#D8D8D8), with subtle vignetting toward the corners. Keep the person's pose, facial expression, hair flyaways, and clothing exactly as in the original. Do not change the hairstyle, hair length, or hair color. Match the existing key-light direction and 5500K color temperature on the subject so the composite looks natural. Output as a 1:1 square at 1024×1024 pixels. Photorealistic and natural-looking, with no white halo around the subject and no color cast on the skin from the new background.