Developers reply:

In regard to the texture map: There are NO original pixels left in the texture map created by FaceShop: every pixel IS replaced and remapped.
The resulting new texture map is new in every respect. This new texture map is the result of how the user sets up/traces the curves - which is an artistic decision.
While I am not a lawyer, from technical point of view the new textures represent a new and unique art work that does not share pixels with the original image in any ways. 

Laslo