

And now he's over here in Australia to present a master-class to a select group of film makers and Josh was invited along. He created ground-breaking special effects in old movies like Close Encounters of the Third Kind, Bladerunner and 2001: A Space Odyssey. One of Josh's heroes is visual effects producer and filmmaker Douglas Trumbull. And then, like a flick book, when you put it all together it appears to be moving. It's when you take a photograph of an object then move it slightly. He does that using a technique called stop motion. JOSH: Well if you use clay it's very clever because it looks like they're moving by themselves. REPORTER: So why do you use clay for your movies? When he's not blowing himself up, he's busy making detailed clay models like Murray the Magpie. Since then, he's been making films with a particular interest in special effects. JOSH LANGMAN, FILMMAKER: Well I first got into filmmaking when I watched a film and I went to bonus features because I thought what's on that then I saw the making of the movie and that got me really interested in it so I thought maybe I could make my own movies. And even at 9 years old, filmmaker Joshua Langman has shown he has both. To be good at special effects it helps to be creative, with a good science brain. Some scenes in this Harry Potter movie were made in Australia. But the special effects can be put together anywhere in the world. The bright lights of Hollywood are where many big blockbusters are made. And let's not forget millions of dollars. These effects can take months and sometimes years to create. Or when stunts like blowing up a building would be too expensive and dangerous. They can be used to create scenes that wouldn't be possible in real life. It all explodes onto our screens because of something called special effects. KIRSTY BENNETT, REPORTER: Whether it's wizards on broomsticks or a war in space.
