Learn about Fortnite’s use of animation Blueprints including the use of Blueprints for gluing together character parts after retargeting, dynamic solutions for low LODs, and faking dynamics in higher LODs with procedural animation techniques.
https://dev.epicgames.com/community/learning/talks-and-demos/DDK/making-the-most-of-animation-blueprints-unreal-fest-europe-2019-unreal-engine