ZBrush 4R6 is a free upgrade for all registered users of ZBrush on Windows and Mac systems and offers increased some great new functionality. The new ZRemesher provides entirely rebuilt retopology system to give even better automated and user guided topology. There are also new brushes and functions to improve your workflow for both organic and hard surface sculpting. For more details on 13 new improvements visit ZBrush Central.
Full documentation for the new version is available within the ZBrush installation directory or at www.pixologic.com/docs/. ZBrush will also be adding new movies to the Education section at www.pixologic.com to demonstrate the new features and their use.