We present an in-depth analysis of a Marshak radiation wave moving through an iron-oxide (Fe2O3) foam
using a 1D multigroup diffusive radiation transport model, MDART (Multigroup Diffusion Algorithm for
Radiation Transport). We consider the consequences of under-resolving the group structure and address
how this could lead to incorrect conclusions in the analysis of general supersonic radiation wave experiments. We also provide an analysis of the types of experimental outcome one may incorrectly link to
physical effects but are in fact due to poor simulation practice.