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3D Stroke

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Daniel Cohen
3D Stroke
on Dec 1, 2008 at 3:13:28 pm


I need to create a light trail around a persons waist.

I have followed the Trapcode tutorial so far, using the demo version.

The layer that I have created is only 2D, even with the '3D layer' icon turned on. I am using a demo version of AE CS4. The Stroke is flat and is not 3D.

Please can anyone help?

Many Thanks,


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Ben Lunden
Re: 3D Stroke
on Dec 3, 2008 at 7:51:41 pm

Hey Daniel,
Unfortunately 3D stroke only operates within that 2D layer if I recall correctly. You'll have to use masks for the effect you are going for.

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young-duk kim
Re: 3D Stroke
on Jan 12, 2009 at 4:05:18 am

hi Daniel
There is one Complex answer.
The core idea is using Camera > Z Clip options

If you finished the 3D stroke Settting, then duplicate the layer.
And Put 'upStroke'layer on 'IMAGE layer', Z Clip front to 0, Z Clip back to 'distance - Camera to IMAGE layer'
And then, Put 'downStroke'layer down 'IMAGE layer', Z Clip front to 'distance - Camera to IMAGE layer', Z Clip back to just 30000...

If you want to animate your camera, the 'distance - Camera to IMAGE layer' can be expressed by Expression~.

like this,
length(thisComp.layer('IMAGE layer Name').transform.position, thisComp.layer('Camera 1').transform.position)

Some explain images is here
(Unfortunately, the language is korean)

- Young-duk Kim

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