That's exactly what the makers of Earth Desk have attempted, creating a live map of the globe that shows real time light and cloud conditions.
View full description Imagine a desktop wallpaper that actually 'lives' in real time.
Earth Desk: Save to file Earth Desk needs to be configured to save the image to a file rather than place it on the desktop.
The setting for this is in the general preferences pane.
There are 10,000 to go through but fortunately you can search for them using the search box.
Note that Earth Desk does not install itself as a standalone application - it simply loads as a preference pane, from where you can administer it.
When you install the Earth Desk in your preference pane, you're presented with the configuration options.
The best part is that you can create various presets and toggle between various settings with a simple mouse click.
Earth Desk is able to render an Earth representation as seen from space and give a remarkable look to your Mac’s desktop without using too much of your resources.