Semi-major axis mass distribution of giant planets at the end of all the simulations for different disc models. The red, orange, green, blue, and purple colours correspond to stellar metallicities of −0.5, −0.3, 0.0, 0.3, and 0.5, respectively. The dashed and dotted lines in Discs 4, 5, 7, and 8 are expected mass trends in viscous and irradiation regions, respectively (see text).