This is a parallax effect that utilizes a series of sliced topographical images of the model Atsumi. As she is moved from side to side and animated over an arch, she appears to have 3 Dimensional features.  This is due to a slight delay in the animation times of each layer. https://www.richardleehill.com/hero/elc115/

For comparison you can also see a single axis Parallax from the same components here https://www.richardleehill.com/hero/elc115v2/