Hi,
It took more time than expected to obtain something I can be nearly happy about ; and it took to my old laptop waaay much more time than expected to render the 2 mandatory images (more than 5 hours for an "only" 2880x1620 image... pffuuu, I need a new and more powerful computer :-/ ).
Anyway, even if I am off the competion, here is my submission:


I wanted to work on something more sober/minimalistic than I am used to do, and focus on the influence of the roughness map on the look & feel.
So I decided to base my submission on paintings from the artist Soulages.
I hope some of you will like it. :-)