18″ 24″ mixed media on paper. by Bill Whorrall. This is an example of using a photographic source without it being static or being solely dependent on a photo reference.
The image above is part of a series about water and other elements related to water. It is also a way of seeing how a photo screened image can become quite painterly and loose. A real challenge is using photography without the media itself dominating the space.
18″ 24 on paper. Mixed media with photo-screened elements by Bill Whorrall
This work uses photo screened images of clouds and water. The soft edges and triangle, circle help push the photo reference away while maintaining the integrity of the photo-derived information. The overlapping color, drawing and writing provide layers of perception and detail.
billzine 
These are really cool, Bill. Great explanation, too.