Least squares conformal map
A least squares conformal map (LSCM) is quasiconformal mesh parameterisation method which produces a 2D representation (conformal map) of a 3D surface based on the least squares approximation of the Cauchy-Riemann equations. By using the map as a guide when creating a new 2D image, the colors of the 2D image can be applied to the original 3D model.
Source: Wikipedia — Least squares conformal map (CC BY-SA 4.0)