For this task I was given the 3 reference drawings below. I sized them in Photoshop, then imported them into ZBrush to create a ZBrush Asian Female model.
This is a head and shoulders closeup video
This is a Lioness ZBrush project. I found my own reference photos on the internet, imported them into Photoshop, sized them, saved them and imported them into ZBrush.
I then combined the two models into one ZBrush file, clothed the Female model and posed them together. Lastly I decimated her and created an obj file of the Female and imported her into Maya to create her in Subdivisions. Please see the Maya Retopology page.