Enabling Moon Global Illumination

Is there a relatively simple way to enable global illumination for the Moon so I can explore the entire surface (especially with a WMS layer on) at once? Since it doesn't (by default) have a night texture or atmosphere I don't seem to be able to do some of the same things one can do to get global illumination for the Earth, so I can explore the whole planet easily.

The same would apply to other solar system bodies--for example, we recently made a module enabling Titan as a geoscope body so we could add overlays of the IR maps and the new topo data, but even disabling planetfx the night side was still in shadow.