  We present an extension to the general relativistic radiation
magnetohydrodynamic code HARMRAD to account for emission and absorption by
thermal cyclo-synchrotron, double Compton, bremsstrahlung, low-temperature OPAL
opacities as well as Thomson and Compton scattering. We approximate the
radiation field as a Bose-Einstein distribution and evolve it using the
radiation number-energy-momentum conservation equations in order to track
photon hardening. We perform various simulations to study how these extensions
affect the radiative properties of magnetically-arrested disks accreting at
Eddington to super-Eddington rates. We find that double Compton dominates
bremsstrahlung in the disk within a radius of $r\sim 15r_g$ (gravitational
radii) at a hundred times the Eddington accretion rate, and within smaller
radii at lower accretion rates. Double Compton and cyclo-synchrotron regulate
radiation and gas temperatures in the corona, while cyclo-synchrotron regulates
temperatures in the jet. Interestingly, as the accretion rate drops to
Eddington, an optically thin corona develops whose gas temperature of $T\sim
10^9$K is $\sim 100$ times higher than the disk's black body temperature. Our
results show the importance of double Compton and synchrotron in
super-Eddington disks, magnetized coronae, and jets.
