In the making...
https://khanhha.github.io/posts/SMPL-model-introduction/ http://files.is.tue.mpg.de/black/papers/SMPL2015.pdf https://openaccess.thecvf.com/content_CVPR_2019/papers/Zhou_On_the_Continuity_of_Rotation_Representations_in_Neural_Networks_CVPR_2019_paper.pdf