Sometimes (all the time, but because we most of the time redraw twice the scene), we do not see the last refresh of the scene. To make it happen : # realy change the viewpoint (not by a rotation/deplacement which will not do a big change between scene redraw) /vis/viewer/set/viewpointThetaPhi 12 3 m Then go in pick mode, and pick. The problem is the same in batch mode when printEPS for the first time.
See http://bugzilla-geant4.kek.jp/show_bug.cgi?id=1369 for printEPS problem (solved)
moved to JIRA. http://jira-geant4.kek.jp/browse/DEV-2