Average deviations () versus n_xy are shown for the total global SEDs and Y image slices for τ_z(1 μm) = 1 and 10, and θ = 0° and 180°. The images are for the τ_z(1 μm) = 1 and θ = 0° case and illustrate the qualitative impact of increasing n_xy. The images are log scaled over the same range. The image Y slice results are shown only for θ = 0° as the results for θ = 180° are very similar. Only the image slices at two diagnostic infrared wavelengths probing the dust emission are shown as the ultraviolet and optical scattered light images are not sensitive to n_xy for Monte Carlo codes. The dashed and dotted horizontal lines give the 1% (global SED) and 10% (Y slice) lines. The results for n_xy = 200 (τ_z(1 μm) ≤ 1) and n_xy = 100 (τ_z(1 μm) = 10) are not shown as is computed relative to these cases where by definition.