Hello, I am Alex, I work as a graphic designer at SpaceApe on the Creative Services team. We work across all the games producing marketing materials, things to go out on social media and in game in the newsfeeds.
Here is an example of a typical bit of work that we do for Rival Kingdoms to prepare the art to go in the newsfeed and on social media when a new Ancient is released.
To start with I take the original digital painting by Martyn. These paintings are perfectly suited to work within the hierarchy of the UI, where they have to convey character and be easily read in a lineup with all the other ancients. However for use in the newsfeed and social media we want to liven them up a bit and exaggerate the lighting and effects in order to create excitement and catch the eye of people idly scrolling through their facebook feed.
So onto step 2, I exaggerate the existing highlights, add a background, various particle layers, glows and magic effects to make the image more dynamic. If all the Ancients had this treatment on their portraits you would get a headache just scrolling through the collection screen!
Finally, I add a layer and paint in some shadows to create a silhouette for use as a teaser image to generate mystery around the upcoming ancient.