Awesome!!! I've seen this pattern and really wanted to try. How hard was it?
As others have mentioned, it's time consuming. If you already know HOW to make them, then it's not necessarily hard to do, just tedious work and takes some patience. A few years ago, Wolftat (one of our "senior" members) posted one of these as a challenge for other members to figure out how it was done. At that time, there was no tutorial and so the hardest part was not doing it, but rather figuring out HOW to do it! There are several members (or past members) that I would consider "mentors" and they probably don't even realise it. Neil (wolftat) is one of them just because I was a fairly new penturner at that time and his "challenge" really stepped up my skills and opened my eyes to some advanced segmenting.
Anyway, there's a tutorial in the library now, so go get it and get to work... or better yet, hold off on the tutorial and see if you can figure it out on your own. I think you'll have more pride in the results if you can do that.