If you enlarge the picture you can see they followed the design of the fabric. If you look at the whole center, you can see the fabric design is a directional. The shading of each design in the fabric along with the quilting gives it a stunning effect!!! What a great choice of fabric for this center!!! The green leave fabric is very similarly shaded and the way they followed the lines of some of the leaves gives it the same more muted effect. Brilliant!!!