https://motherboard.vice.com/en_us/article/43bk9j/horse-motion-capture

From Roach in Witcher 3 to Epona in The Legend of Zelda: Breath of the Wild, horse companions are special and iconic parts of some video games. But they’re usually animated by artists because using motion capture to record a horses movements is a pain in the ass.

We know, because Animatrik—an animation studio that’s worked on video games and movies—is doing mocap on horses for use in an upcoming video game project it can’t disclose. Animatrik has been doing motion capture and effects work for more than a decade, but it’s never worked with horses.