In a single run, the vAg shifts as the run continues and you get a variety of shapes and sizes which we call K grains (Klunkers). The emulsion in question would probably look like a soccer ball. It requires a double run.
If ammonia is present, or another solvent, in a single run, the grains tend to one size and shape but are rather amorphous giveing smooth rounding tending towards spherical. Without the solvent, and with control, the ends and edges tend to be sharp and well defined.