I'm not sure what you mean by "smooth animation". Please go into more detail about what you're trying to do.
Viewing post in smoothness of the 3d model
look this .capx https://disk.yandex.ru/d/ll0DMsRY3NvVVA
on layout "operation"
if you click 1, 2, or 3, the person's animation will smoothly transition to a specific stage. Can I adjust the smoothness of the transition?