Michelle Rodriguez entered the show as Ana Lucia Cortez in the second season.
It was during the third season that she was asked to make some promo shots. To convince her, she was shown the promo shots already made by Evangeline Lilly and Elizabeth Mitchell and told that her promo shot would probably not be used and definitely not unless the promo shots from Evangeline and Elizabeth was also used.
The promo shot was really good and Jeff (or J. J. Abrams) was thoroughly unhappy that he couldn’t use it for promotion of the show. However, now the show is over and he is no longer bound by any restrictions to use the material, which is why it was possible to include it in the Behind the Camera material.