Example of temporal variability of line profiles during the N59 simulation sequence, sampled at 20 instances of time. Left columns: strong Fe Iλ436.59 nm, χ = 2.99 eV line (in the shortward blue); right columns: weak Fe Iλ675.27 nm, χ = 4.64 eV line (in the longward red). The upper row shows profiles for the disk center μ = 1; the bottom row shows integrated sunlight, corresponding to a full solar disk, synthesized using center-to-limb profiles from the small simulation area. The magnified images on the right show the line centers on a uniform wavelength scale in units of radial velocity (top); the tick marks on the vertical axes correspond to those for the full profiles.