KeyShot is a magical rendering software, which has been integrated into ZBrush 4R7. In ZBrush, click the rendering menu, select the external renderer, then select the KeyShot, and click the BPR button to automatically send all the selected items to the Keyshot. If you don't have the latest version of ZBrush or Keyshot Bridge, you can select all the sub-tools and export them as. Obj files, then open Keyshot and import them.
Related Tutorial: www.zbrushcn.com/shili/zbrush-keyshot-njqrx.html