Line profile for the damped sine-wave velocity case with lower spatial n_r = 129, n_θ = 17, and n_φ = 17, and higher angular resolution n_Ω = 512 × 512 than in Fig. 5. The comoving mean intensity J_λ for each voxel on the surface (there are 65 × 17 = 1105 of them) is plotted as a function of λ (red lines). The green curve is the 1D result using the methods of Baron & Hauschildt (2004) and Knop et al. (2009b,a). Here the scattering fraction is ϵ = 1 for computational expediency, and the line strength is Γ = 100. With the very low spatial resolution, the 3D result no longer envelopes the 1D result (which by assuming spatial spherical symmetry has essentially infinite resolution in n_θ, and n_φ).