You can get it here: https://angelfernandes.artstation.com/store/KAkg/forest-ground-material-substance-designer
It was intended to be a simple soil ground, but then you start adding rocks, grass... how about clover? and leaves?... I think this is what happens when you start jamming without any clear reference but a bunch of forest pictures.
Also, I find the parametrization stage very relaxing, almost like unwrapping uvs on a model...just, chill.. is it just me?