Thanks to your striped fabric I have worked it out. Such a fun way to play with fabric.
This technique is dangerously addictive! Unfortunately, I would need the copyright holder's permission to share the method and as she has books on the topic, it probably wouldn't be forthcoming.
Look out for books by Lynne Edwards MBE.
A very interesting and unique pattern. You have done a beautiful job/Lillian
Very pretty. And the added texture of the origami makes it so much more interesting to us all. But to a blind person, it would be like a story .