Examples of simulations with increases width of size distribution, W = 2, 10 and 100. In a) r_h = 0.61, τ_dyn = 1.0 while in b) r_h = 0.85, τ_dyn = 0.5. For each simulation the leftmost frame shows a MC ray tracing image of a typical snapshot, seen from B = 90° viewing direction and illuminated from B′= 25°. A 4λ_cr × 4λ_cr region is displayed. The middle frame displays a slice of the same snapshot through the equatorial plane, with the label indicating the A₄₀ asymmetry amplitude calculated for the simulations. The rightmost frames shows a time-averaged surface density autocorrelation function: the label and the red line indicates the effective wake pitch angle calculated from the longitude of minimum I/F. The contour levels correspond to 10%, 30% and 50% overdensities. In all simulations ϵ_n = 0.1.