Model fits of scattered light to the VYSOS B and R band data in LDN 1780. Models are shown for four different forward scattering parameters, g = 0, 0.50, 0.75, and 0.90, and a range of albedos a as indicatedin the figures. The blue lines are for albedos in regular steps of 0.1 and the red lines for an intermediate a, given as the last one in the list of a values. The surface brightness is in units of 10⁻⁹ erg cm⁻² s⁻¹ sr⁻¹ Å⁻¹.