Substance material completed for an art test - spent just over a working day making this not including rendering.
Very basic reference was provided for this material; just some internet shots of various crumbling pathways. Intended as a tiling environment material for an fixed high angle camera.
Substance Designer with cheeky abuse of Atlas Splatter using Quixel foilage/leaf atlases for the organic scatter over the flagstones.
No baked in presets on this one, but the material still has bulk parameters and settings for adjusting.