Log-scaled synthetic image of a bound debris disc with both the birth ring and the extended halo highlighted. The SB sampling scheme is overplotted: Elliptical apertures on one half of the disc account for disc inclination, while circular apertures on the other half are shown for comparison. Apertures are colour-coded by scattering angle, with the minimum and maximum scattering angles indicated. RA and Dec offsets from the disc centre are shown in arcseconds on the x- and y-axes, respectively.