I originally started out with hexagonal bumps, but these these just didn't look right, so I switched to circles. (Actually the bumps are modified hemispheres.) The basic shape of this vase is based on similarly shaped early Native American pottery. Those had no bumps of course, but were usually painted with fancy designs.
To save time you might like to know the bumps are arranged in 27 columns of 33 bumps each, for a total of 891 bumps. This part printed in just under 15 hours at a print speed of 80 mm/sec and a layer height of 0.200 mm.