When I did my 'Rotational Discretion' tessellation , I mentioned that the same pattern could be done without leaving any gaps. This tess is the fulfillment of that assertion.  At first glance, your eye might be drawn to the center where you'll see a six pointed rhombus star. However, if you change your perspective just a little you might see the series of multi-shape triangles rotating around the center. They are comprised of 3 each of rhombuses and small triangles.  As the tessellation repeats the same thing occurs. You get those six rhombus stars, but at the same time each of those rhombuses is a single piece of the larger multi-shape triangle patterns.  It's an interesting study in how the shapes of the grid can create and be a part of more than one pattern at the same time.  This is a difficult tessellation simply because all flagstones tessellations are. But once you get the hang of them, doing more and more, they do become much easier to execute....