/3/ - 3DCG

this question is corelated with Unity

is it possible to create a random animation? not just a "recorded" animation that was randomized that is the same every time
but one that is different always
say I have a tree and I want the leaves or whatever to move slightly but the movement to be random
I know I can use c# scripts in Unity to randomize transformation/scaling but this is too basic
say the tree is more complex and I wanna add bones into it, now I can't do this in Unity
so it would have to be an animation that I do in Blender and then export to Unity
is this even possible?