Take a look at these images of Ellen Ripley, star of the Alien series. Take a good look. Squint if you have to. Now let me tell you that these are not photographs of Sigourney Weaver, taken while filming the movie.
Nor is this a 3D image, made using data captured from the film.
No, this is a sculpture. The entire thing is made from silicon.
It's the work of artist Steve Scotts, and you can see more images at the link below.