  We study real photons produced in heavy ion collisions at RHIC, and we
calculate their spectrum and its azimuthal momentum anisotropy. The photons
from a variety of sources are included, and the interplay and the
time-evolution of those sources are modelled in a full 3D hydrodynamic
simulation. We quantify the v_2 of thermal photons produced in ideal and
viscous fluids, and the consequences of using different initial conditions are
explored.
