Self-consistent spectra from hot thermal plasmas mutually interacting with cold media without internal dissipation. The Thomson optical depth of the hot flow down to the central plane is τ_T = 0.4 and the spectra are observed at inclination of i = 60°. Red solid, blue dotted, green dashed, brown dot-dashed and pink triple-dot-dashed lines correspond to the covering fraction of the cold clumps of f_cl = 1.0, 0.8, 0.6, 0.4 and 0.2, respectively. The ionization parameter here is log ξ = 1. All spectra correspond to the same bolometric luminosity.