New Sky Atmoshphere - Night Lighting?

I’ve been playing with the new Sky Atmosphere, and it’s pretty amazing; however, I can’t seem to be getting the night setup right. I have added a second directional light and set its Atmosphere Sun Light Index to 1 (as laid out in the documentation), which works just fine, but produces just a second sun. At night, the sky is pitch black; the material included with the atmosphere includes a star texture, but I can’t seem to figure out a way to display Sun Light Index 0 (original directional light) during the day, and the stars and Sun Light Index 1 (the moon directional light) at night.

Anybody figure this out yet?