Finally an easy explanation of Crackle WeaveSusan KeslerSimpson author of the popular Overshot Simply and Shadow Weave Simply now explains Crackle Weave ampampquotsimply.ampampquot Her teaching style is to break down the weave structure into its basic parts so that it is easy to understand and then teach you how the parts work together to create the weave structure so that you can use any pattern or create your own.The areas of separating threads give Crackle Weave its appearance of cracking pottery and once you see how the structure works there is so much you can do with it Crackle weave is a block weave structure made up of four or more threading blocks that are based on the twill structure. Each block has four threads made up of two primary threads and two secondary threads. Incidental threads are added when needed to keep the proper twill sequencing.