How to create the maps used in Hair Content Examples Shader?

I’m stuck on this one, it seems the hair shader in the content examples uses very specific maps to render the hair.

I’m wondering how to create these maps, I believe this is the info from the paragon video.

  1. unique id: random variant of strand
  2. root/alpha: gradient
  3. depth: displacement ?

How would I go about creating these maps ? I tried figuring out how to use this via maya hair and ornatrix but can’t figure out how to get a nice grayscale version of these maps, which the shader seems to like (grayscale hair alphas)

Thanks !