You can set the 'quick render options' in the front/top/side windows to 'final'  (or any quality you need)
and do a quick render. You can even set that window to 'maximize' and then do a quick render for a larger image. However you cant save this image (well, I dont know how).You could do a screen capture, would that do?

"I paint that which comes from the imagination or from dreams, or from an unconscious drive. I photograph the things that I do not wish to paint, the things which already have an existence."
Man Ray, modernist painter
http://artpearl.redbubble.com/