Advances in computer graphics 38th Computer Graphics International Conference, CGI 2021, virtual event, September 6–10, 2021, proceedings - Magnenat-Thalmann, Nadia 1946-; Interrante, Victoria; Thalmann, Daniel; Papagiannakis, George; Sheng, Bin; Kim, Jinman; Gavrilova, Marina (Springer, 2021)