Here's another handy Maxwell material for grabs!
Download it from my Gumroad page (obviously for free) and use it as you like.
It's 4k and tile-able,
Normal map is in 16 bit (so it won't give you those nasty artefacts)
It has only few BSDF layers so very simple to tweak, and pretty efficient to render.
If you're a V5 user, you can benefit from RandomColor procedural, which I already set up in this material.
So if you'll apply this material to a group of objects (like in the image above) - you will have some very slight colour variation, just a touch.
here are some more images with it .. same scene basically.
So grab it and create something awesome!!