• Adobe After Effects

  Make Fire Flicker

  Posted by Kevin Gonzales on March 22, 2008 at 2:50 pm

  OK, all Im trying to do is to make a photoshop layer of a fire flicker. I’ve played around with opacity but going in and setting key frames every few frames is a pain in the ass. Does anyone have a better suggestion.

  thanks.

  Nate Hanson replied 18 years, 4 months ago 2 Members · 1 Reply
• 1 Reply

• 

  Nate Hanson

  March 22, 2008 at 7:12 pm

  If you need to randomly change the opacity level every few frames, use the wiggle expression.

  Alt-Click on your opacity stop watch, then type:

  wiggle(frequency, amount)

  Example:

  wiggle(12, 5) – this would modify the opacity 12 times per second, by five units each time. So if your opacity is set to 50%, this expression would adjust your opacity from 45 – 55 percent, twelve times each second.

  Here is a tutorial by Andrew Kramer in case that doesn’t make sense:
  https://www.videocopilot.net/basic/ae_expressions.html

  Hope that helps,

  Nate

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