Molly at The Purl Bee shows her technique for sewing curved seam pillows to create the bold designed pillows shown above. Molly writes:
After a lot of tinkering with a compass and scrap fabric I finally figured out how to do it using four identically pieced quadrants, but I also figured out something unexpected. If I played with the orientation of the quadrants I could make a bunch of other equally cool designs. I love discovering simple tricks like this and I had a great time deciding on my favorite arrangements.