This may sounds strange but I want to create a video and show the steps when adding the different effects to te scene. I want to have a high quality picture of the 3D View. Can I make this without taking screenshots?
If you don't have to record an interactive session, but an animated one, you can use "OpenGL render active wiewport": the button is in the footer of the 3D window, the last one on the right. It works exactly like a normal rendered animation: the paths, settings etc are in the Render panel, and the start/end are the ones set in the Timeline.