Rendering of a set of several hundred flux tubes filled with hydrostatic isothermal atmospheres (with the same scale height) viewed in a plane-of-sky projection. The grayscale corresponds to the square of the column emission measure in arbitrary units. The flux tubes are initiated in the z = 3 pixel plane and the radius at the base is 0.5 pixels on the rendered image, so all of the flux tubes are resolved at the base. Note how tubes that do not expand a lot in the plane of the sky appear brighter and stand out from their neighbors, which do expand in this projection—this result is particularly evident in the close-up panel labeled #1. Also, note the characteristic elongated bright spots where the loops turn toward the observer (close-up #2).