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Help! with 3d stroke and Null layers
hello,
I made an animation with 3d Stroke, and i want to put it in a live-action shot, with a camera movement. I’ve tracked the motion with PFtrack, and imported the file in AE. now I have 1900 Null layers and 1 camera shot, how do I connect the 3D
stroke effect with the Null layers and the camera? please help. i’ve a deadline soon.thanks
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3 Replies
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If you’ve tracked properly, in AE the null layers are static, while the camera moves.
You don’t need to connect the stroke to the nulls — in fact, the 3D stroke layer must be 2D. You just need to make sure that 3D stroke uses the comp camera, which is the moving camera created by PFTrack. Now, placing the stroke in 3D space (using the 3D stroke effect controls and the position of the mask) may be tricky, but with patience, you should be able to do it.
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Steve’s suggestions notwithstanding, you could animate a light following your tracked points and use Particular’s path mode to create a “stroke”. This might be much easier than lining up 3DStroke.
Mylenium
[Pour Myl
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You’re quite right, Mylenium — sorry I missed that. I just finished a job using Syntheyes and Particular. They worked quite well in that context.
Some notes:
1. You need Particular 1.5
2. Follow the instructions to the letter: emiiter must match first light position, and velocity of particles must be zero. Otherwise you’ll get odd results.
3. The head of the stroke is affected by the light position and the particle lifespan, while the tail of the stroke is infinite (leading back to the emitter position) unless you cut off the emitter at some point. To do that, animate it from whatever to 0 over a few frames, then drag those two keyframes in time until you see the stroke’s tail where you want it.Hope that helps,
Steve
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