i like pic 15 where the "big" model is looking at her smaller doppelganger. However the transition is between 2 entire different scenes. Perhaps you could somehow blend it to make it more easy to transit as i shift my eyes from the big gal to the small one?
I love the colours very much and i nv thought blank space can be this interesting =D
I shall try it myself next time. Keep up the good work! A photogenic model is very good to work with ;p