Line opacity, A_k(N) ⋅ f(N) [10⁻⁸ cm⁻¹ s⁻¹], for (TiO₂)_N clusters N = 1 … 6 in the wavelength window relevant for potential JWST observations. The (TiO₂)_N integrated line absorption coefficient, A_k [10⁻⁸ cm² s⁻¹], data is from Appendix C in Jeong (2000). The 3D MC cluster number density, f(N) [cm⁻³ ], is used for t = 10⁷ s (top panel) and t = 10⁹ s (bottom panel). Both times show little difference in opacity despite their different cluster number densities (Fig. 10). (TiO₂)₄, (TiO₂)₅, and (TiO₂)₆ have the largest line opacity amongst the N = 1 … 6 clusters. Their detailed line spectra are shown in Fig. 12.