Simulations where the total mass of accreted pebbles is limited to (from left to right): M_Z,final = ∞ (unlimited; left), 8, 6, and, 4 M_⊕ (right). Plotted is the total planet mass against time. Simulations terminate at crossover. Blue curves correspond to runs with additional opacity from mm-sized pebbles (the pebble opacity vanishes along with pebble influx). Green curves correspond to runs with only molecular opacities. The color indicates the nature of the accretion material, ranging from dominated by pebbles (black) to being dominated by nebular gas (blue or green).