Column density enhancement maps for high and low resolution simulations of both Step-like (SL, Model V; left column) and CR-only (CR, Model VI; right column) models. High resolution models are 1024 × 1024 pixels while low resolution models are 512 × 512 pixels. Colour bar shows the logarithm of the density enhancement. Roman numerals in the top right of each panel indicate the model number while the subscript h indicates high resolution models.