Thanks for the comments  

Andreas, regarding skin colors ... 3 different light sources , auto white balance, and I made no effort to make the skin color  look the same 
1. ambient light, overcast sky,  red floor
2. speed light bounced of a white wall, plus crazy processing, b&w layer, analog efex pro
3. studio lights , this one looks the closest to reality
here is 2. without the additional PP, and it is yet another skin tone 

