Peter Keller's flagstone weave tessellation. This one is really tightly packed. Definitely not for the impatient folder. It takes a lot of finessing and coaxing. I folded, unfolded and refolded so many  times before I was able to begin collapsing the design. Including folding the initial 32 pleeat grid, I probably spent 10 hours all together folding this design. It's hard to know exactly, since I was at work and kept getting interrupted. Suffice it to say, it was a lot of hours before I achieved success. They were enjoyable hours well spent though. It was an easy crease pattern to understand, but a challenging one to fold. I was pretty uncertain for a while that I would finish. I used some ordinary colored printer paper that wasn't very forgiving. It seemed like the papper was going to give out and just go limp and useless. Still, after so much folding, I kept at it. I had nothing to lose. To my surprise, eventually the paper began to cooperate and I was a

This is similar to a design I was trying to conceive. Almost identical, except my hexagons were smaller. It's a typical flagstone that uses triangles on the backside to 'push' the front twists together. Flagstone tesses result in beautiful backlit pictures. They create optical illusions of three dimensions. The front and back also present very different patterns. https://www.flickr.com/photos/syngola/4967646805/in/album-72157624777290209/ What's interesting about flagstone tessellations is that they are pretty different from standard tesses. Even if you're familiar with the spread hex or other like designs, the flagstone genre is a unique variaation that will require you to learn new techniques in order to fold it. Typical tessellations are folded a few pleats at a time and flattened as you go. It's a progressive, linear process. For a flagstone the easiest way is to sure up all the creases and then unfold. Refolding/collapsing in clusters of single

Lady's Flower tessellation. https://www.flickr.com/photos/praisepratajev/5526816483/in/album-72157627404378271/ Hexagons surrounded by closely grouped triangles. Looking at the crease pattern, I wasn't 100% sure how to fold the all of the triangle twists. Some seemed to be too close together. But once I got a good portion of the tess folded it became more obvious how some of the triangles rotated to fit into the design. A pretty easy fold compared to similar designs.

Here's a single module version of a crease pattern which can be tessellated infinitely. It's a flagstone tessellation designed by Robin Scholz who posted the crease pattern here .  Flagstone tesses are interesting in that you kinda need to precrease and then assemble all at once. Unlike more traditional tessellations where you simply fold a small portion and then continue folding small portions, flagstones don't lay flat in the intermediate stages. Each twist is dependent upon the other twists which emanate outwardly from it. Or at least, that has been my experience. They are a lesson in patience and persistance. On large grids with many twists it can get kinda crazy. Still, the results are worth it. Little girds like this one are great practice and still pretty interesting when complete.