Light and Dark for map

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codingwithchad codingwithchad
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Light and Dark for map

I am trying to build a map that will display what parts of the earth are in daylight and what are dark.

Is that something I can do with an earth file such as

<map name="light_test"  type="projected">
    <image name="readymap_imagery" driver="tms">

What is the proper way to add the light such as that to the entire map?
Chad H. Glaser
Working with osgearth to implement geospacial realistic simulations