Final masses of planets forming by planetesimal accretion as a function of initial radius r₀ and initial time t₀ in the disc for Z = 8.0% in planetesimals. The green line is the pebble production line, where we assume that a production of pebbles is needed to first form the planetesimals, so every point beneath the yellow line should not be taken into account. The red line now indicates the planetesimal isolation mass (Eq. (26)), so everything below it has reached planetesimal isolation mass. Everything above the white line has M_c<M_env. The top plot shows the full r₀–t₀ parameter space, while the bottom plot is zoom into the inner r₀–t₀ parameter space to enhance the interesting parts of the diagram.