This image was created with two separate Reality/LuxRender renders blended using an awesome program called Combine ZM.
You can download the program free at http://hadleyweb.pwp.blueyonder.co.uk/CZM/News.htm (No, I do not work for them nor am an affiliate, I just love the program. :) ) I was unable to get the gun and her face in focus without it.
Oh yeah, here's a simple tut for how to do this: http://www.wonderfulphotos.com/articles/macro/focus_stacking/
Image © Justin Littler