Mass of cold rapidly infalling gas in radial 3.3-pc-wide bins at 0.25, 0.5, and 0.75 Myr (solid red, blue, and green lines and shading, respectively) in simulations L0.5, L1.0, and L2.0 (top, middle, and bottom panels, respectively). Solid lines show the mean of the four stochastically different simulations; shading encompasses their full range. Dotted lines in each panel show equivalent results from the control simulation.