Hi,
last minute entry. All the work done today as I had no time prior to that to sit on the shader, but I really wanted to do something for this contest.
My choice of reference is:

and here's what I got - shader mainly has tweakable "studs" height and amount of holes:




It was fun making this shader as good as I can and fight with time while doing it.
I hope you like it,
Cheers!