contrary to what it would seem,
no there are no 'textures' applied to this.
I printed out the pictures I had taken, (black and white ink) and placed them against a blank pieces of paper and soaked them in water and let them dry. On some of them you'll see what appears to be scratch marks or circles and those were made by pressing various objects (including quarters) into the paper.
hence the miniseries name 'soaked'