State of simulation with only the atmospheric ice line included, for t = 0, 200 Ω and 2000 Ω^-1, from left to right. Upper panels: distribution of blue ice particles and red vapour particles, with the grey area representing the condensation zone. The size of the blue dots are proportional to the size of the ice particles and the number of particles shown is inversely scaled with size for visibility. Lower panels: evolution of the size distribution of ice particles at corresponding times. N is the number of ice superparticles, and the size is given as R/R₁. At the water ice line, R₁ ≈ 1.3 m.