4D Gaussian Videos with Motion Layering. - Pinxuan Dai; Peiquan Zhang; Zheng Dong; Ke Xu 010; Yifan Peng 001; Dandan Ding; Yujun Shen; Yin Yang 002; Xinguo Liu; Rynson W. H. Lau; Weiwei Xu (ACM Trans. Graph., 2025)