Schematic representation of the way the UV continuum (red) and the Lyα (blue) photons propogate in the high-contrast regime. The medium illustrated here is composed of high-density clumps (H i + dust), distributed in an empty interclump medium. A fraction of the Lyα photons scatter on the H i atom comprising the surface of the clumps. The rest of the Lyα photons, as well as the UV continuum photons, pierce the clumps where they may be absorbed by dust.