Perfectly Clear

Computer animation has become increasingly popular in recent years. There are still some optical effects that are difficult to replicate in computer animation.

See if you can notice what is incorrect in this image from the movie, Shrek 2.

Click to show the solution!

Solution

The trick to this scene is in the bubbles. When light passes through a liquid, refraction occurs. The bubble acts as a lens and magnifies the object behind it.

If you look through the bubbles in this picture, you can see that the objects behind the bubbles are not magnified!