Configuration of inferred sectors for an example model. Top: the left plot shows the integrated covering factors while the right plot shows the same topology but with a different, random, geometry. The color scales from yellow to red as the gas volume density increases. Different inner radii indicate different ionization parameter (U) values, with dotted arcs showing U = 0, 1, …. The gray arcs show the photoionization and photodissociation fronts. The depth is not drawn to scale. Bottom: sectors are distributed randomly in 3D according to their relative covering factors and then projected in 2D. Screening/extinction effects are ignored. Stars are added for visual purposes only.