Gas and dust distributions for two widely separated Jupiter-mass planets. Blue dots represent 1.6-mm dust particles, superimposed on the perturbed gas surface density ΔΣ/Σ0 (color scale). Dashed green (yellow) lines indicate the 2:1 (3:2) mean motion resonance with the outer planet. The plot is zoomed in the region between 15 to 35 AU to better visualize the dust overdensity near the outer gap edge.