Four physically motivated distributions of the escape fraction placed on a scale to indicate their connection to the two simplified physical pictures of how ionising photons may escape the ISM of their host galaxy. The blue picture represents the density-bounded leakage mechanisms, while the green scenario is where ionising photons escape through ionised low-density channels. In both scenarios the arrows indicate the escape of LyC photons. The constant distribution represents a scenario where all galaxies have the same physical conditions, and LyC photons escape via purely density-bounded leakage from Strömgren spheres with the same column density, while the bimodal model can represent an ionisation-bounded scenario where leakage is mostly strongly sightline dependent and/or a density-bounded scenario that is strongly time variable. The log-normal and exponential distribution represent complex mixtures of the two main leakage mechanisms.