The seams are usually very complicated when working the clothing in ZBrush, because there's very few resources and requires patience. On this quick tutorial you will learn to create your own seam alpha maps from any image or photograph.
These are my custom made high resolution seam-brushes that I created for zBrush. Based on psd alpha files with custom icons these brushes are ready to use as they are. Just extract them to your brushes folder and navigate there with