Top panel: dust polarisation SMA maps toward NGC 1333 IRAS 4A from FGG11. Middle panel: synthetic dust polarisation map generated with DustPol, following the FGG11 convolution scheme, using the best fitting parameters of the Allen et al. (2003) model found by FGG11 (see Sect. 4.4 for more details). Each panel shows the intensity (contours), polarised intensity (pixel map), and direction of magnetic field (blue segments). Contours depict emission levels from 6σ up to the maximum value in steps of 6σ, where σ = 0.02 Jy beam^-1. The middle panel shows the beam and the angular and spatial scale. Bottom panel: histogram of the difference between the position angles computed with the radiative transfer tool in FGG11 and DustPol.