The Animation Layer Toolkit brings non-destructive, additive animation layers to Blender. Instead of editing keys directly on a base performance, animators stack layers on top of it - a broad pass on one layer, an offset or overshoot on another, a polish pass on a third - and blend them together. The base animation is never touched, so experiments stay reversible and the original take is always one slider away.

I built it with the Python API to fit the way I choreograph ride and character motion: block the main move, then sculpt secondary motion, noise, and cycles on separate layers without fear of losing the take underneath. Each layer has its own weight and mute, layers can be reordered or soloed, and the whole stack bakes down to clean F-Curves when it is time to hand off.