This is a well-known challenge in 3d animation which is only overcome in big production movies.
The two level separation is carried one stage further, in that the workers work underground, eyes glazed with such monotonous work, while the masters work above ground, in what features as a brightly-lit city, heavy with traffic and taxis and sporting not only the Eternal Gardens but also Yoshiwara, its own red light district, for the pleasures to be found within. Fredersen is the powerful master of the city of , devoid of feelings and he is the almighty one who controls life underground.
He lives in his own purgatory, brought on by the death of Hel, the woman he loved, who originally belonged to another (Rotwang).
Whilst Rotwang is responsible for making man machines to work in the underground city, his loss of Hel causes him to create a female robot in her image.
Human robots are becoming more and more fascinating as robotics evolves.
Below is a selection of the best videos showing human facial expressions.