Final masses of planets (M_P = M_c + M_env) as a function of initial radius r₀ and initial time t₀ in the disc. The plot features a metallicity of Z = 1.0% in pebbles and an amount of Z_dust = 0.1% in micrometer sized dust grains, which is a factor of 5 smaller than in Fig. 4. The different lines inside the plots have the same meaning as in Fig. 4. A lower amount of dust grains results in a colder disc, which reduces the pebble isolation mass in the inner disc and therefore increases the parameter space that allows for the formation of ice giants compared to Fig. 4. In the outer disc, formation of larger bodies is easier compared to Fig. 4, because of the larger pebble size and smaller pebble scale height H_peb in the outer disc.