Relation between gas surface density and star formation rate surface density, measured with the disc seen face-on and over circular regions of radius 500 pc. The centre of each region is selected randomly outside the central 2 kpc. We did study the bulge region and contamination through it. The dashed black line is the relation defined for nearby disc galaxies by Leroy et al. (2008a). The II-Wet-Control run is shown with blue squares and the average or II-Wet-Orb1 and II-Wet-Orb2 with red squares, no meaningful difference is found between the two runs, or with other II-Wet runs.