The curve on this cushion cover is known as a ‘Hilbert Open Peano Curve’. Theoretically, curves of this type can be made to completely cover a surface.

This doesn’t work in real life. The cover consists of a very open filet crochet grid with the curve applied in surface crochet. The cushion shows through the grid.

This pattern is also available in our Cushy Numbers ebook and we have an afghan version of Spacecraft.