Evolution of photospheric properties for our model set. From top to bottom, we show the evolution (the x-axis is shown in logarithmic scale to better reveal the rapid changes at early times) of the radius (top), velocity (middle), and gas temperature (bottom) at the location where the inward integrated electron scattering optical depth is equal to 2/3. The dashed lines correspond to early epochs for models logP3p10 to logP3p45 in which we computed single snapshots based on V1D inputs.