TSG

TSG is a very versatile Geant4 visualization driver. You can use it with (TSG) or without (TSG_FILE) a Geant4 GUI. It’s my favorite driver for the creation of animated Geant4 visualization examples.

From the output of /vis/list below, you can see that TSG is the same as OGL, while TSG_FILE is the same as TOOLSSG_OFFSCREEN, a viewer used to create image files instead of an interactive window.

Registered graphics systems are:
  G4HepRepFile (HepRepFile)
  ASCIITree (ATree)
  DAWNFILE (DAWNFILE)
  RayTracer (RT)
  VRML2FILE (VRML2FILE)
  gMocrenFile (gMocrenFile)
  TOOLSSG_OFFSCREEN (TSG_OFFSCREEN, TSG_FILE)
  OpenGLImmediateX (OGLIX, OGLI)
  OpenGLStoredX (OGLSX, OGLS)
  TOOLSSG_X11_GLES (TSG_X11_GLES, TSGX11, TSG, OGL)
  TOOLSSG_X11_ZB (TSG_X11_ZB, TSGX11ZB, TSGZB)

TSG_FILE

Since TSG_FILE is used to generate image files without a Geant4 GUI, it can be used in a container, or in a remote server:

/vis/open TSG_FILE
/vis/drawVolume
# dump the visualization to a png file
/vis/viewer/refresh