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i spent a long morning trying to do just that with only FCP and a bullet smoke trail as a displacement map. to put it mildly it didn't work. i think they probably used Maya or a similar 3d package (max would work) and created spreading ripple shapes behind the bullet, then they overlaid those in a compositor (AE or Shake probably) with complicated displacement settings. i'd keep fooling around with max - i bet it can do it. | PerryKroll.com | TRC | "If not actually disgruntled, he was far from being gruntled." Wodehouse
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| Posts: 5197 | Location: Tisch at New York University | Registered: June 03, 2003 |    |
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Alumnus
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If you have to do this, there's a few different ways. The most complex method that gives the best results is to model ripples (basically many squashed torii aligned on an axis) and use your 3D program to generate reflections based on the imagery in the shot. Composite these into your shot, reduce the opacity a little, and use the mattes like you describe to make it "follow" the bullet.
Of course, the big difference between an amateur and professional production is that you likely don't have computer-controlled cameras. As a result, the bullet and ripple motion is not going to perfectly match the background shot - the perspective will probably be slightly off, etc.
You could also try using the ripples as a displacement map in After Effects, but this gives less of a "Matrix" appearance than the other method.
The third possibility is to invent your own bullet-style effect. How about a directional blur behind the bullet's path, tapering off like a comet tail? That may look good.
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| Posts: 1871 | Location: Gainesville, FL | Registered: April 05, 2004 |    |
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