The above list of software is the minimum required for a non-graphical setup of Geant4. To build and use visualization graphics in Geant4 and/or a graphical user interface (GUI), at least one of the following graphic systems or packages is required in your computing environment:
DAWN , a PostScript renderer.
Qt , a cross platform application and UI framework (version 4 preferred).
Open Inventor (free software from SGI).
Open Scientist (Interactive environment, including GUI).
Alternatively, you can produce an ascii file for VRML or DAWN.
More information is available in Section 8.6, Visualization Drivers, of the User's Guide for Application Developers.