Projections of the PySM sky at 353 GHz composed of free-free, synchrotron, AME, and Galactic dust. The upper row shows cutouts around the Galactic south pole, and the lower row shows cutouts around the Galactic centre. Each cutout is composed of 600 × 600 pixels of the size 0.86′, making 8.6° ×8.6° maps. The left column shows cutouts from the original PySM sky, which feature pixelation artefacts due to their pixel size of 6.9′ (N_side = 512). The right column shows modified cutouts obtained by first updating the original map to a higher resolution, 0.86′ (N_side = 4096), by oversampling using the HEALPy function ‘ud_grade()’ and then smoothing with a Gaussian kernel of a width that is close the original pixel size of the PySM maps (FWHM = 10′). This reprocessing of the PySM maps removes the pixelation artefacts while only marginally lowering the spatial resolution.