Dust density vs. distance for two different l.o.s. towards upper (blue shades) and lower (grey shades) parts of the foreground structure (over-plotted on Fig. 1). The black line shows the mean and the shades represent one standard deviation (also computed by the Gaussian process model). The grey-shaded first peak represents the foreground cloud while it seems to be connected to the main cloud in the background (the second peak). The two blue peaks illustrate the front and back edges of the foreground cloud.