Cloud or surface coating hypothesis for Pluto’s CEs. CE corresponds to the example CE in Figures 2 (largest and easternmost) and 6, and SP2 corresponds to a nearby Sputnik Planitia locality. The 95% statistical confidence intervals are smaller than the filled circles, and the two P_LORRI (19° solar phase angle) measurements of each locality are barely to not distinguishable. Hapke+haze photometric functions are shown using SP2 best-fit parameters and P_LORRI and P_HiPhase_HiRes incidence and azimuth angles (both angles are approximately constant; Table 2). Hapke+cloud+haze photometric functions are shown using best-fit SP2 surface/shallow subsurface and global haze and CE cloud parameters and P_LORRI and P_HiPhase_HiRes incidence and azimuth angles. Best-fit parameters for each locality, however, were determined using angles specific to each measurement. Optically thin scattering between the surface and global haze, by a cloud or surface coating, satisfactorily fits differences of an example CE on Pluto from its surroundings.