Quantity. This string had a lot of individual “spaces” in it to fill with tangles. Since I selecting tangle patterns randomly, sometimes a busy tile works, and sometimes it doesn‘t. I think, for the most part, this one works. Zentangle drawing done with Micron pen on Strathmore Vellum Bristol. Tangles: Chicken Wire Chillon Gloven Hurry Knight‘s Cross Narwal Nzeppel Quabog Snail