Our RT modelling in typically done in RADMC-3D, which uses a cartesian grid (either regular or nested AMR). However our original fluid simulations are performed with either SPH (a meshless scheme), or Arepo (a moving Voronoi mesh). As such, we need to first put our fluid simulation variables onto a regular grid. These cubes have strange formats, and so we provide IDL scripts to help the user to read and manipulate this data. N.B. The IDL scripts require a common block to be defined in the calling subroutine to access the data products. See the .pro scripts for details.