Prominence appearance of the MPI-AMRVAC filament and prominence simulation according to the Lightweaver framework synthesis of various spectra lines. Bottom row: comparison between the hydrogen Hα line core synthesis and that of the proxy method of Hea15; the pixel-by-pixel comparison in the rightmost panel, coloured according to the KDE for the log₁₀(I_ν) scatter, yields a Pearson R test score of 0.98. Top row: appearance of the simulated filament according to the Ca II 8542 & K, and Mg II k line cores respectively. All units 10⁻⁶ ergs s⁻¹ cm⁻² sr⁻¹ Hz⁻¹.