Backdrops

Before ecosystems were available in Vue, some people built distant forests or other such scenes, rendered those to 2D images, and them used them as backdrops in future Vue projects.

For those who do aerial scenes, getting realistic backdrops of the earth from thousands of feet in the air is a problem. I found that you can use aerial views from Microsoft Flight Simulator.
 
MSFS version X supports good photographic scenery add-ons from 3rd parties. So, if you happen to be a flight simulator fan (or know one) and have added photoscenery to MSFS, you can navigate to a good view and do a screen dump to use as a Vue background. MSFS-X lets you control the time of day, the weather and cloud system parameters. Clouds in MSFS-X are very nice.