Certain things about her like the knee bend aren't possible for humans to successfully replicate
http://i40.tinypic.com/1zzj6e8.png
Please, be so kind as to tell me what, precisely you are comparing between the two knees shown in the picture? I mean, serioously:
1. One is flat-footed, the other in extreme heels (love the boots, though),
2. One appears to be toward the end of a stride cycle, the ohter somewhere in the late middle, or in early recovery;
3. The thighs are at different angles;
4. The pictures are at different scales;
5. The reference polygons are insultingly different, indexed to different portions of the anatomy;
6. There is no attempt to adjust for the sizes of the figuers, nor for the sizes of the photos;
7. There is no attempt to adjust for the different angles of the photos...
And so on.
Seriously, what do
you think those photos have to say about postures and movements that "cannot be duplicated"?