  In this first research note of a series of two, we present a comparison
between two Monte Carlo radiative transfer codes: MontAGN and STOKES. Both were
developed in order to better understand the observed polarisation of Active
Galactic Nuclei (AGN). Our final aim is to use these radiative transfer codes
to simulate the polarisation maps of a prototypical type-2 radio-quiet AGN on a
wide range of wavelengths, from the infrared band with MontAGN to the X-ray
energies with STOKES. Doing so, we aim to analyse in depth the recent
SPHERE/IRDIS polarimetric observations conducted on NGC 1068. In order to
validate the codes and obtain preliminary results, we set for both codes a
common and simple AGN model, and compared their polaro-imaging results.
