motifs and patterns are generated by computer and printed on fabric , paper or plastic materials in continuous non - repeating patterns . the data is produced automatically by a random math algorithm , so that each of the printed patterns is similar , but not identical . the layout is arranged in a random manner , so that every part of the print is unique and exclusive . the size , color , motifs as well as the level of similarity or variety of the motifs and any other parameter essential to the design are all managed by the software .