Motion blur

Keep the subject perfectly still and sharply focused. Create strong horizontal motion blur moving from left to right in the background and around the outer edges of the hair, while preserving facial details. Cinematic speed effect, realistic motion streaks, shallow depth of field, professional portrait photography, natural colors, ultra realistic, photorealistic, 4K. Preserve the original face exactly. Do not change facial structure, eyes, nose, lips, hairstyle, age, ethnicity, skin texture, or expression.