Inelastic collision influence on Q/I profiles of the Mg I triplet. The solid, dotted, dashed, dot-dashed, and triple-dot-dashed lines result from the factor ε′ = 1, 100, 500, 1000, and 2000, respectively. In the top panels ϵ_Q/ϵ_I profiles are plotted, η_Q/η_I profiles are depicted in the middle panels, and in the bottom panels ϵ_Q/ϵ_I − η_Q/η_I profiles are presented. The continuum intensity corresponds to .