ArtDaily reported an exhibition opening in Dallas on the links between Impressionism and photography. It started me thinking whether photography changed our requirements of painted art. In a sense, the camera framed a scene in a new manner. This was not simply a matter of space, but also of time. Snapshots (instants in time) became an accepted way of engaging with the world. The camera was the equivalent of Twitter, personal, potentially unposed. The Impressionist painters carried this sense of immediacy into their work.