Structure and spectra of exemplary clouds simulated with CLOUDY at constant pressure, assuming log(P_tot) = 16 cm⁻³ K, V_turb = 100 km s⁻¹, N_c = 10²⁴ cm⁻² and Z = 10 Z_⊙. The assumed values of ionizing fluxes are logΦ(H) = 18 cm⁻² s⁻¹ (displayed in green), 20 cm⁻² s⁻¹ (black) and 21 cm⁻² s⁻¹ (blue). An additional example with logΦ(H) = 18 cm⁻² s⁻¹ and the addition of extra mechanical heating is displayed in red. Top left: Cloud temperature profile in logarithmic scale as a function of depth (z) of the cloud. Top right: Cloud density profile in logarithmic scale as a function of depth (z) of the cloud. Bottom: Spectra of Fe II emission from different models, displayed with 100% covering factor. Each synthetic spectrum is broadened with a Gaussian kernel with FWHM = 2500 km s⁻¹.