H_E-band S/N of the ICL + BCG interpolated across halo mass, redshift space for a fixed ICL fraction of 15% (left) and ICL fraction, redshift space at a fixed halo mass M_h = 10^14.7 M_⊙ (right). The figures are produced as described in Fig. 5, but for the S/N measured within a 100–200 kpc annulus. All points and lines are coloured and drawn as described in Fig. 5, with the addition of two dotted lines showing the S/N = 10 (left-most) and 3 (right-most) lines from the 50–200 kpc annulus, for ease of comparison.