While making the pictures I only try to pay attention to their mimic, body position, composition and background, to match the old photo as good as possible. I never ask them to get out any attributes or props; they always do that themselves and that's great to see! During the shoot it's the challenge to exactly match the position of the models head and body and get them to imitate their looks. At post-production I crop and tilt the image and adjust some controls to match the old image. If it's a high-contrast image, I'll turn up the blacks in the new photo.