1. A computer-implemented method to model hair and skin, the method comprising: receiving a plurality of multiscopic images depicting at least part of a subject having hair; analyzing the plurality of multiscopic images to determine one or more hairs depicted in the plurality of multiscopic images; generating one or more 3D hair segments representing the determined one or more hairs; and generating a 3D model of skin underlying the one or more hairs, based on the generated one or more 3D hair segments and by operation of one or more computer processors.