• Adobe After Effects

  Trapcode Particular: Moving particle light streak within a moving frame

  Posted by Jackson Parker on October 16, 2013 at 2:20 pm

  Hi there,

  so this is driving me crazy. I have a parallel dolly shot of a person running from frame left to right. I have tracked the shot (not the person, just the camera movement), the tracking data is keyframed in a null.

  I use Trapcode Particular to create light strokes surrounding the person. Now, the strokes move around the person, attached to their hand/head and so on. Since it made more sense in this case, I have hand-keyframed the movement of the strokes rather than tracking the person itself. While this works fine, I am stuck with an obvious problem: While the strokes follow the movement of the person just fine in time, the earlier keyframes stay at their inital position, when they should instead follow the dolly movement. I am simply not finding any way to get this to work – obviously, when i pair the stroke layer with the null containing the dolly movement, everything, including the latest keyframe of the stroke, is being re-positioned in the frame. What am I missing?

  Thanks for your help!

  Cassius Marques replied 12 years, 10 months ago 2 Members · 1 Reply
• 1 Reply

• 

  Cassius Marques

  October 16, 2013 at 9:10 pm

  What do you mean “tracking data is keyframed in a null” ? You have to track the shot and then solve the scene resulting in an animated camera. After you have a camera, Every 3d element (including particular) should follow through.

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