Examples of the largest clusters with N_largest ≈ 200 emitted in our simulations. The colors denote the particle size and range from blue (radius 0.5 units) to red (radius 5 units). The left particle is from one of the low VFF simulations of the core–mantle case with β = 3.5. The particle has a maximum extent of 21,40 and 27 units in the x, y and z direction, respectively. The right particle stems from one of the low VFF simulations of the pure ice case with β = 2.5 and has a maximum extent of 24, 39 and 62 units in the x, y and z direction, respectively. The largest red particles possess diameters of 10 units and the samples are eroded into the −z direction, with periodic boundary conditions in the x and y direction. Mind the difference in scale between the left and right particle.