I'm not a paper crafter so I can't say that it's like Iris folding. With cut and fold, you bond 2 fabrics together, cut at key areas with a craft knife then put on top of another piece of fabric. You then stitch cut area open. That's my understanding of it. I've only seen the one book on this method and have a friend that playing with the blocks now. I'll get the low-down from her as to how it actually works.