Perm: A Parametric Representation for Multi-Style 3D Hair Modeling - He, Chengan; Sun, Xin; Shu, Zhixin; Luan, Fujun; Pirk, Soeren; Amador Herrera, Jorge Alejandro; Michels, Dominik L; Wang, Tuanfeng; Zhang, Meng; Rushmeier, Holly; Zhou, Yi (International Conference on Learning Representations, 2025)