A conception of an ancient and/or future Mars, flush with oceans, clouds and life. I know Mars in EP hasn't been terraformed this far yet, but you can get some gorgeous, fairly hi-res artistic renderings of a blue mars done by software engineer Kevin Gill.
Download the images here:
https://docs.google.com/folder/d/0B5gEWNRhmLMTYkEyR3FQY2pjRVk/edit
See his explanation here:
https://plus.google.com/113761354606401247247/posts/K8RQu5xu3EH
I don't plan on using them other than as inspiration and maybe desktop backgrounds, but I can think of four scenarios where you might use them, two which are dramatic changes to the setting:
1) Mars terraforming is dramatically (and likely catastrophically for the inhabitants) accellerated (Titans, aliens, one of the more extreme factions having gotten hold of some Titan, or equivalent, tech)
2) The player characters are frozen or stored and emerge in the future...
Less dramatic:
3) These are renderings done by a faction that plans to accellerate the terraforming of Mars at any cost
4) A virtual reality sim set on future Mars.
—
Transhuman Mind