copycat...the technique is from Strips and Curves by Louisa Smith. There are a number of videos and, if you're a member of The Quilt Show, the author is on there a couple of times.
Personally, I didn't find the book helpful and wouldn't suggest it unless you can get it cheap or are a draftsperson, because a lot of it is explaining how to draft your own templates and was way above my head. You could just draw up your own templates, IMO. I did and then had them cut out of acrylic. It does have some beautiful pictures in it of finished quilts.
If you read what you can on the 'net you will figure out the process of using the templates on the fabric "strata".
If you have any specific questions, PM me.
Watson