Left: comparison of the best-fit Robitaille envelope model (black crosses 40 m baseline, black rectangulars 90 m baseline) for the visibilities of NGC 2264 IRS 1 with the MIDI visibilities (gray rectangulars 90 m baseline, gray crosses 40 m baseline). Right: comparison of the best-fit Robitaille model (black line) for the spectrum of NGC 2264 IRS 1 with the ISO spectrum (gray line), the MIDI spectrum (dark gray crosses), and the data points from Table 1 (black rectangulars).