I don't have any close-up photos.
But you can see some on following internet sites :
http://manfred.rausch.free.fr/staedte/freiburg/freiburg.html#vorhalle
http://www.frsw.de/freiburger-muenster.htm#M%FCnstervorhalle%20-%20Gerichtslaube%20und%20Himmelspforte