  Neutrinos dominate the energetics of core-collapse supernovae, and are
believed to play an important role in driving the explosion. The development of
a spatially multidimensional neutrino radiative transfer code is a key part of
the Terascale Supernova Initiative, a multi-year effort aimed at understanding
the supernova explosion mechanism through supercomputer simulations. I will
describe the conservative formulations of general relativistic radiative
transfer we have developed for this application, and the algorithm we are
implementing in our parallel code.
