For the optical properties, we indeed found that the excitation energies and, in particular, the absorption intensities of the investigated systems are affected by the unphysical polarization even when it is predominantly concentrated at the outer boundary. While the errors in the excitation energies mostly canceled out when considering several configurations, thus yielding the same average excitation energy whether the MIC is used or not, that was not the case for the absorption intensities. The reason for the latter was attributed to the use of the effective external field approach, which yields more accurate absorption intensities but is highly affected by the polarization of the environment. For the same reason, the absorption intensities converge substantially slower with increasing cutoff distance than the excitation energies. For the excitation energies, we observed faster convergence when using the partial cutoff model compared to the complete cutoff/droplet model, while it was comparable for the absorption intensities. Nonetheless, the convergence behavior shows that a convergence analysis must be carefully performed, irrespective of the property or cutoff model used. For calculations of accurate spectra, we recommend using the MIC together with the effective external field, which leads to more accurate environment polarization and removes the need for convergence analysis.