Often in when doing playback graphic on a feature film I need to take existing images wether it's a computer desktop, smart phone screen, software application, news graphics, etc... and add the fake "movie" story content to it.  

In Wall Street: Money Never Sleeps I needed to take existing stock monitoring software and add the Keller Zable (KZI) our fake company I the film to it and make it's stock data match the story.  

I also animated the stock ticker animation used to project on Shia LaBouf's face. 

Most of the story driven news segments were shot on green screens.  I needed to build the final composites early in production so they could have them for playback on set.  

I designed and animated the news elements... 

As well as tracking the shots and building the final comps.

One thing that always proves to be difficult in building content for feature film is clearing the use of artwork and photos.  Even stock photo libraries can be too expensive or have licensing issues with the production company... That's why I make sure I take pictures where ever I go. In one of the news clips we needed a New York background... 

It is actually a photo I took on my iPhone from the top on the building I was staying in while I was there shooting The Taking of Pelham 123.

I cropped, retouched, and flipped it for use in the composition as the backdrop for the news segment.