10 More Awful Times Movie Actors Were Combined With CGI

Poor Uma Thurman always gets stuck playing rubbish nature-themed villains, and while her Poison Ivy was really, really bad, at least the character wasn't saddled by some flat-out laughable visual effects augmentations.

The Lightning Thief kick-started the Percy Jackson film series, a Harry Potter wannabe all about Greek mythology, fantasy, magic, and monsters. The film contains appearances from a Minotaur, a three-headed Hydra, and Steve Coogan with a terrible goatee, but the worst offender in the villains department is easily Thurman's Medusa, who might have been fun to watch had her snake-hair not been so incredibly distracting.

Obviously it would've been difficult to create a wig made out of snakes so a CGI assist was needed, but there had to be a better way to execute the character than this. If you stare at the scene long enough, all you start to see is Thurman's face floating in mid-air as your eyes begin to pierce right through the mess of pixels enveloping her head.

But by far the most naff thing about Medusa is the fact that the snakes' shadows are wildly inconsistent. Some of them cast really obvious ones on her face, while others just... don't? It makes Thurman's face weirdly bright, a lot more than it should be. Obviously, the filmmakers wanted the audience to be able to make out their star's face, but eliminating shadows only hampered the blend of CGI and actor that the scene needed to get right.