  We study the emission characteristics of thermal photons at RHIC and LHC as
affected by both the space-time evolution of the bulk medium and the thermal
emission rates. For the former we compare the results of two evolution models
(expanding fireball and hydrodynamics). For the latter, we detail the influence
of hadronic emission components and study a speculative scenario by upscaling
the default QGP and hadronic rates around the pseudo-critical region.
