rd7 is an artist currently working at Gameloft's Shanghai studio. And, uh, that's about all we know about him (or her)! What we're lacking in biographical information, though, we're more than making up for with awesome images of sci-fi settings, mechs and people wearing highly impractical body armour.
If you like the stuff you see in the gallery below, you should check out more on rd7's CGHub page.
To see the larger pics in all their glory (or, if they're big enough, so you can save them as wallpaper), right-click on them below and select "open in new tab".