The A.T.O.M.I.X. Engine (Advanced Trajectory & Organic Motion Integration Xylostroma) **Please Scroll down to find BlockBench Plugin, it's just an animation Engine 

It is an ultra-efficient core animation and physics framework built by Prof. Raedon James A.k.a. Prof. AtomicX to completely revolutionize entity movement and performance in Minecraft Java Edition. By bypassing legacy rendering bottlenecks and replacing heavy, script-reliant animation loops with a native, low-overhead pipeline, this engine delivers hyper-realistic kinetic movement at a fraction of the hardware cost of traditional animation tools

BlockBench Plugin and instruction for Forge 1.21.11 for modders, Animators:- (Blockbench Plugin 1.21.11)