Spatial (a VR co-working app) does something similar to this, though a bit more simplistically (all you upload is a face pic; I think body height is determined

Spatial (a VR co-working app) does something similar to this, though a bit more simplistically (all you upload is a face pic; I think body height is determined at runtime based on how high the headset is from the floor). It did a pretty good job with pictures of Tommy Wiseau and Nicolas Cage in my testing, though it does raise the potentially creepy issue of impersonating non-celebrities in VR social environments.