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Adotis
Adotis
Participant
October 11, 2018
Question

How do I make a "Write-on" line tail fade over time?

  • October 11, 2018
  • 4 replies
  • 2581 views

I have a Write-on line that is keyframed to move along a path and I have the Stroke Length set to 1 second to make the line disappear as it is being drawn. However, I would like it to fade out as it disappears throughout the duration of the path.

I have the line fading in as it begins and I have it fading out as it ends, but I would like to also have the fade during the path.

I see an option for Paint Time Properties > Opacity, which sounds like what I'm looking for, but I don't understand how to use it. Can anyone help me figure out how to do this please?

This topic has been closed for replies.

4 replies

angie_taylor
angie_taylor
Legend
October 13, 2018

As I said in the other question about this technique, the simplest method is to create your line animation using Write on and then add the Echo effect to it. Adjust the time to change the direction and spacing and adjust the composite options to set the fade duration etc.

Roland Kahlenberg
Roland Kahlenberg
Legend
October 11, 2018

When the Paint Time Properties parameter is set to Opacity, you will have to keyframe the Brush Opacity property to see the brush's opacity change in opacity over time.

Very Advanced After Effects Training | Adaptive & Responsive Toolkits | Intelligent Design Assets (IDAs) | MoGraph Design System DEV
Mike_Abbott
Mike_Abbott
Legend
October 11, 2018

Yes - but that opacity change doesn't 'travel' with the write on effect point - hence my ''wont work' conclusion above.

Roland Kahlenberg
Roland Kahlenberg
Legend
October 11, 2018

I present "Evidence A". ;-)

Very Advanced After Effects Training | Adaptive & Responsive Toolkits | Intelligent Design Assets (IDAs) | MoGraph Design System DEV
Mike_Abbott
Mike_Abbott
Legend
October 11, 2018

Yes - Write-on / Time properties opacity sounds like it should do what you want - but it wont : (

A better approach would be to draw a mask for your path and use the Vegas effect with 1 segment and a longer length. Animate the rotation parameter to move the stroke along the line.

If that doesn't do it for you - let us know. There are a few other options eg: Echo effect. This is one of those odd 'should be much simpler than it is' tasks in AE.

jasontcox
jasontcox
Inspiring
October 11, 2018

Moving to the After Effects forum as this is an AE question.

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