  The polarization of real photons emitted from early-time heavy-ion collisions
is calculated, concentrating on the contribution from bremsstrahlung and
quark-antiquark annihilation processes at leading order in the strong coupling.
The effect of an initial momentum space anisotropy of the parton distribution
is evaluated using a model for the non-equilibrium scattering kernel for
momentum broadening. The effect on the photon polarization is reported for
different degrees of anisotropy. The real photons emitted early during
in-medium interactions will be dominantly polarized along the beam axis.
