Thanks for sharing your work.
Consequently, I just downloaded Google SketchUp (I've been meaning to check it out) and you can actually export a 2D image right from the program. If you go File -> Export -> 2D Graphic and select it to save as a JPEG it'll actually save you a step or so. Even so, the print screen and screenshot stuff is valuable to know for this any other applications...it comes in handy.