Take hexagon (or "hexie") quilts for example. I've made a few small ones. I love how they look when finished. For some reason I only have a picture of the unfinished top of this one that I did back in 2013.
In order for that to happen, a whole lot of this had to happen:
The Project of Doom quilt I'm working on is really complex behind the fabric. Here's a picture of a finished block: