Using Light Streaks

[Bill Williams]

If you use a light as your emitter, you can simply draw a path using the mask tool, and copy and paste the mask’s path data into the lights position property.

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[Luis O maymi]

What do you want to write?. If is a text (for example “HELLO”), write the text > right click on the text layer > select “Create Mask from Text”. This will give you a mask for each letter so you will need to duplicate the light emitter according to your text (for example in HELLO you will need 5 light emitters). Then do as Bill recommended, copy and paste the light path data into the light position property.
Note: If you are using Particle World you need to make an expression to link the X, Y and Z values with the lights position. Andrew Kramer discuss how to do this in the tutorial 3D Stroke Effect in Video Copilot.net.
The expression will look something like this

x=thisComp.layer(“Light 1”).transform.position[0]-thisComp.height/2;x/thisComp.width

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[Michael Smith]

Thank you very much to both of you, with your tips I was able to do the light streaks write something.