2D dust-void structure for three different values of δ in the gas-dominated regime (St = 0.04), for a planet with M_p = 1.5 M_⊕. Top: case without dust turbulent diffusion in a viscous gas disk, which is similar to the case a) studied in Benítez-Llambay & Pessah (2018, their figure 1). Middle: case of an inviscid gaseous disk (α = 0) without dust turbulent diffusion (δ = 0). Bottom: dust-void and filament are destroyed for δ = 3 × 10⁻³. Snapshots at t = 50 orbits.