HD Geometry is the next evolution in digital sculpting. With the ability to divide your model up to a billion polygons, now your limits are based only on what you can imagine. You can focus your attention on specific area of your 3D creation while ZBrush handles the rest of your model in a very system friendly way. This is why you can achieve a billion polygons without having to worry about purchasing expensive graphics hardware. ZBrush’s powerful memory handling allows you to sculpt with out limits!
To learn more about sculpting in HD, visit ZBrush.info for a short tutorial on sculpting elephant skin and ZClassroom to view a video tutorial.