I spent most of this weekend working on starting to work on a portfolio of repeat patterns. These are patterns I wouldn't use for Rifferaff, but I would try to sell to agencies. It's fun to work in a different style and color palette than what I try to do with my own line. This whole world is very new to me, so new in fact that I need help on how to make a pattern! When I make patterns for silkscreening I know that my screen will be 18 x 24 so I just arrange the images on an 18 x 24 artboard in Illustrator and call it a day. When making patterns for sale, I have to make a repeating swatch that can be repeated infinitely and potentially be applied to products of any size. I know in theory how making a pattern repeat should work, but after much trial and error I just can't get my seams to line up. They're always off by a hair and it's making me crazy because when I tile the swatches there are always visible lines. Is there a magic step? Am I supposed to be using the grid and my math skills to measure? Or is there a special command in Illustrator for this purpose? Or does it just take lots of trial and error? Help in the comments section please!