Humanoid Animation Importer

Configuring downloaded humanoid animations is the same twenty clicks, per file, forever. Set the rig to Humanoid. Point the avatar at the character. Open Root Transform. Bake Into Pose, three times. Based Upon, Original, three times. Then do it again for the next forty clips.

Humanoid Animation Importer does all of it on a folder, in one click. Every model is switched to Humanoid, the character generates its avatar, every animation is pointed at that avatar, and every clip gets its Root Transform settings. Models already matching the settings are skipped, so nothing is reimported for nothing.

THE PROBLEM NOBODY ELSE FIXES

A humanoid clip does not store rotations. It stores every muscle normalized to [-1, 1], and those bounds are the range of motion declared in your avatar. Downloaded animations are authored on a generic skeleton that ignores those bounds, so a pose can ask for far more rotation than your avatar allows. Unity clamps it. On screen, the head barely turns, or a limb points somewhere absurd, and nothing in the Editor tells you why.

This is not reserved to extreme poses. Two real measurements, on stock animations of a stock character:

- Aiming idle: the head asks for 1.96x the allowed rotation and gets clamped to half of it.

- A plain walk: the shoulder asks for 1.54x.

If an ordinary walk cycle is already being clamped, so is most of your library, and nothing in the Editor has ever told you.

The tool measures it. Right after Apply, it reads the muscle curves off the clips it just imported and lists every muscle that goes out of range, with the value it peaks at and when it happens. No extra step to find, nothing to configure. Widen the character limits then gives the avatar exactly the range those peaks need, and the list drops to zero.

Measuring changes nothing on its own. It reports, you decide.

WHY BASED UPON = ORIGINAL

Because Body Orientation and Center of Mass make Unity recompute the pose from the centre of mass, which distorts asymmetric poses: an outstretched arm, an aiming stance, anything not symmetrical. Original keeps the pose the animator authored. The tool defaults to it.