2008ApJS..175..534E

We present a new version of the fully three-dimensional photoionization and dust radiative transfer code, MOCASSIN, that uses a Monte Carlo approach for the transfer of radiation. The X-ray enabled MOCASSIN allows a fully geometry-independent description of low-density gaseous environments strongly photoionized by a radiation field extending from radio to gamma rays. The code has been thoroughly benchmarked against other established codes routinely used in the literature, using simple plane-parallel models designed to test performance under standard conditions. We show the results of our benchmarking exercise and discuss the applicability and limitations of the new code, which should be of guidance for future astrophysical studies with MOCASSIN.