its just re-ranged to 0:1 and will be expanded back out when it's sampled by the shader - exactly the same as a normal map just divide the resultant [-1:1] vector by 2 and add 0.5
My first attempt at animating a quadruped creature. Feedback appreciated https://syncsketch.com/sketch/NjM5OThjYzk5/?offlineMode=1#/23812797/24684380/f_10