Do you have a good grip on reality or do you see a blurred line dividing reality and make-believe? Well, if you have some idle time in your hands, maybe you can take this challenge. The challenge - created by Autodesk - is pretty simple: all you have to do is take a good, hard look at the images then choose if it's a real photo or if it's created by computer graphics (CG).

To take on the challenge, click on the 'Read' link and see for yourself if you have a great grasp on what's real and what's not. Plus, if you get a perfect score, you'll have a chance to play in a bonus round. For now, here are some of the photos that you'll have to distinguish. Tell us all about your test scores!