Postscript level 3 with dvips

[Sven Garbade <garbade@psy.uni-muenchen.de>]

Hi List,

how can I create a postscript level 3 file from a dvi file? I use the
tetex 1.0.2 distribution and it seems that dvips produce only Postscript
level 2 files.

Thanks, Sven