CP for this: www.flickr.com/photos/8303956@N08/2925994660/ Something that I noticed Melisande do in one of her recent works was use overlapping/intersecting pleats that weren't resolved with a twist fold. I previously avoided these because they lack the closure/locking of twist folds, and generally aren't as visually appealing... However, I decided to experiment with this idea a bit. The cool thing about this tess is how it locks very flat. I can't really describe it too well other than to say it involves rearranging some layers around the twists. If you want to see for yourself, just fold a small segment of this tess on a 16x16 grid and you will see what I mean. This tess can be folded very easily with a 3-step process: 1. Collapse all of the "regular" twists 2. Keeping that collapsed, collapse the iso-area twists directly on top of that. 3. Flip the layers of the "regular" twists to the front to lock the pleats from step 2 in place. The end result is very interesting. The non-backlit view has this illusion of squares lying on top of a weaving background pattern, but as soon as you backlight it, the squares disappear.