G. Natale, C. Popescu, R. Tuffs, A. Clarke, V. Debattista, J. Fischera, S. Pasetto, M. Rushton, and J. Thirlwall. (2017)cite arxiv:1709.03802Comment: A&A accepted. DART-Ray can be downloaded at https://github.com/gnatale/DART-Ray/; Code documentation: http://www.star.uclan.ac.uk/~gn/dartray_doc/; N-body/SPH galaxy simulation examples: http://www.star.uclan.ac.uk/mgsv/.