Realignments also work when aligning one polyhedron with another,
and may be applied using either the -y or -Y option.
In this case, a C3v subgroup of a hexagonal pyramid is aligned with
a C3v subgroup of a cube, which is followed by a realignment by
translating along the principal axis
View this model with the command
polygon pyr 6 | off_trans -y C3v -Y cube,C3v,0,0:-1.0 | antiview - cube