I’ve always wondered about this for many years, but i’ve never asked anyone,
Say if i have a model, Bones and all.
And i have another animate model, Can i use the model on unity and use the other models animations?, if not why?, How i think it is they have bones basicly so wouldnt they be able to do the same thing as each model?
Yes you can, but only when both models have the exact same rig (bone structure= same hierarchy ans bone names). Just add the AnimationClips to the other models animation-clip-array and you shoule be able to use the animation. Note: If the bone-hierarchy is different you will get really strange results.
ps: A bone structure usually is represented by a tree of gameobjects but Unity puts all of those into a 1d-array (the bones-array). The real important thing is that the order of the bones in that array is the same as on the other model.