Texture adds interest to a pot. A variety of different things can be used to add texture, it's really only limited by your imagination. In this photo I've used a dried cob of field corn to texture a slab before using it to make a serving plate. A few of the other things used frequently in my work is a piece of carpet runner, the grinder from a pencil sharpener, rope around a closet rod and embossed wallpaper. Each adds its own uniqueness and it's fun to try different things to see the effect.