Autodesk Showcase 2013 which is in most of the Autodesk Design & Creation Suites is basically like a real time renderer. Basically, you apply a shader and go and the result is awesome. IMHO, you can use the print screen option and use the image in your demo real or portfolio*! To make this techology work, Showcase requires serious GPU muscle and it will use all of it.
"One of the side effects is that if you are running AutoCAD, Inventor and Revit at the same time as Showcase, you may experience some slow downs."
"Autodesk Showcase uses the graphics card to its full potential. This may sometimes lead to other applications not having enough resources to maintain acceptable performance and responsiveness.
In particular, the Task UI feature in Showcase is most associated with such performance degradation in other products. Turning this Showcase feature off by temporarily toggling Options -> Show Task UI (Q) will restore the previous performance levels in your Autodesk product."
*An very interesting article on renderfarms is here:
As of May 10th, 2012, this issue is resolved when you install Showcase 2013 SP1.