Cobblestone Plates Substance Designer

Hi everyone!

This is my "Stone Tiles" 100% Procedural Material.
Created this in Substance Designer and rendered in Marmoset Toolbag.

This is my test for Sperasoft Studio https://www.artstation.com/sperasoft: tried to recreate the scanned texture published by Sebastian Zapata (https://www.artstation.com/artwork/0qdB4), and i wish I did it cool.

First shots are with materials' Real Color, to show how similar it is to the original (for my test).
And then there are my Marmoset renders with different light.

So, I want to know your opinion. Hope you enjoy this!)