  We present a 3D special-relativistic radiation hydrodynamics code. It uses
the radiative inversion scheme with the M1-closure relation for the radiation
equations, which allows the treatment of a wide range of optical depth,
temperature and opacity. The radiation field is treated in the grey-body
approximation. We present the standard 1D and 2D tests that include both
optically thin and thick scenarios, as well as hydrodynamical and radiation
pressure dominated configurations. As an application in 3D, we show the
evolution of a jet driven by radiation-hydrodynamics with a helical
perturbation. The code is expected to allow the exploration of scenarios in
high-energy astrophysics where the radiation is important, like sources of
GRBs.
