Hi! :) It really does depend on what you are using the fabric scans for in terms of digital art application. Seamless means that the pattern repeats without any obvious breaks or "seams". Although clothes in the real world do have seams and patterns don't always match up, for 3d texturing you have to create very believable seams for the clothing item to be acceptable or the item should be seamless. Hope that makes sense. Sometimes you need to fill in an area of clothing or whatever with a pattern and it is easier if that pattern is seamless as all you need to do is fill as opposed to spending time to make that pattern seamless. I have to be honest, I make a lot of my own patterns and do various scans of materials/fabrics and make them all seamless - first thing I do. If I am buying fabrics, I won't buy if they are not seamless unless they are exceptional and something I particular want! Hope that answers your question a bit! Please feel free to shout if it doesn't! regards Diane