Blend Trees
When using multiple animations, having a way to go into and out of them smoothly would be helpful. Having a great walk cycle and a great run cycle is good, but if they do not blend seamlessly, it will take away from the realism. This is when you want to add a Blend Tree.
Unlike an Animation Transition that blends between two animation states, a Blend Tree incorporates multiple animations that need to play at the same time, and all help to contribute to the final look.
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