Dust distributions for three representative grain sizes. From left to right: 100 µm, 1.6 mm, and 2.6 cm particles. Rows correspond to different planetary configurations: single planet (top), two Jupiter-mass planets on close orbits (second), two Jupiter-mass planets on wide orbits (third), and a Jupiter–Saturn pair on wide orbits (bottom). The dashed black curve shows the radial gas surface density profile (normalized between 0 and 2π). Filled green circles mark the planet locations.