10 Great Movies With Terrible CGI

I Am Legend takes place in a post-apocalyptic world where a retro-virus has either killed humans or turned them into vampiric mutants called Darkseekers. The story follows a virologist called Robert Neville who does everything in his power to find a cure for the creatures to save what's left of humanity.

It's common knowledge that this adaptation is quite a departure from Richard Matheson's novel of the same name. Nevertheless, the 2007 movie's long shots and slow build up helps to keep the viewer on edge. Unfortunately, all the tension disappears the moment you see the Darkseekers. Their movements and facial expressions are exaggerated to the point where they'd feel more at home in a comedy than a sci-fi horror.

These visual effects are so heinous, viewers couldn't understand why the film crew didn't bring the creatures to life with actors wearing prosthetics instead of CGI.

Well, that was the original plan. But during the screen test, the director worried the Darkseekers resembled "angry mimes", so switched to CGI in the eleventh hour. But upon watching the screen test, there's no question the original design of the monsters is vastly superior.