Perturbed gas surface densities (Σ∕Σ₀) for an MMSN-like aspect ratio at t = 12 500 orbits of the inner planet, in the Compact (first row) andSpread (second row) configurations. The positions of the planets are marked by dots in each panel (blue corresponds to Jupiter, orange to Saturn, green to Uranus, and red to Neptune). The disks can be considered axisymmetric, which is important for the dust evolution model that takes the 1D radial gas profile as an input.