Autodesk has released a movement-based video effects app for Mac OS X Lion.

The Motion FX app lets users create smoke, fire and other fluid effects that react to real-time movements captured on the Mac FaceTime camera.

Autodesk said the app makes the most of new facial tracking technology and full-screen mode on Mac OS X Lion, as well as its Maya (pictured) fluid effects technology to create swirling motion-driven effects in real time.

Vice president of Consumer Products at Autodesk, Samir Hanna, said: “The app lets you play with dazzling effects that come from the sleight of a hand or roll of the eye, turning live movements into works of art.”

The app is free from the Mac App Store.