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Hi, Nested parameterization of two layers of replica and parameterized volume at the bottom layer does not work for G4Tubs nor G4Sphere. You may still have a nested parameterization, which is much faster then 3-D single layer parameterization, by having three layers of parameterized volume. Do not forget to specify the proper axis for 1-D voxelization for each parameterization. Hope this helps, Makoto > -----Original Message----- > From: Jainil Shah [mailto:firstname.lastname@example.org] > Sent: Friday, September 24, 2010 1:39 PM > To: medical_app-g4hn > Subject: Nested Parameterization of a Sphere > > > *** Discussion title: Medical Applications > > Hey guys, > > I need a little help.. > > I have recently been working on parametrization of a cube using > nested > parametrization, and it works fine. But now i want to do the same > for a > Sphere. Is there a way to Parametrize a Sphere in 3 dimensions > using > NestedParameterization or any other method ? > > Jainil > > ------------------------------------------------------------- > Visit this GEANT4 at hypernews.slac.stanford.edu message (to > reply or unsubscribe) at: > http://hypernews.slac.stanford.edu/HyperNews/geant4/get/medical_a > pp/248.html