Background opacities as a function of wavelength in typical photospheric conditions (T = 5600 K, P_e = 10 dyn cm^-2, P_g = 8 × 10⁵ dyn cm^-2). Solid line: using the Wittmann package. Dashed line: using the NICOLE package. Dotted line: using the SOPA package. The lower curve represents the scattering contribution to the opacity (all three packages yield the same result within the line thickness of the plot). The scattering curve has been multiplied by a factor 100 for better visibility in this plot.