• Adobe After Effects Expressions

  Control Fx on off (or opacity) of several layers from slider control or checkbox

  Posted by Nicolás Elvira on January 21, 2021 at 11:28 pm

  Hi! Im new here and I’m trying to make a template for myself and my team, and we have different color pallettes for different uses. I would like to control this different 4 color gradients (in each layer, backgorunds and several shape layers) from one layer, with a slider control or different checkbox controllers.

  I was trying with something like this

  – if (thisComp.layer(“GRADIENT”).effect(“Corporate”)(“Checkbox”) > 0) {100} else {0}. on the fx opacity expression. It works with one but it´ starts to fail once I add another checkbox controller for the second gradient.

  or I would like to assign a specific range in the slider control to select one 4 Color Gradient (from its opacity) or another, but I didnt find the right expression…

  slider = thisComp.layer(“GRADIENT”).effect(“Gradients”)(“Slider”);

  if (slider < 0 || slider > 1) 100 else 0

  Any ideas?

  Thanks very much in advance

  Nico E.

  Filip Vandueren replied 5 years, 8 months ago 2 Members · 1 Reply
• 1 Reply

• 

  Filip Vandueren

  January 22, 2021 at 8:39 am

  Alternatively, You could add the different looks as keyframes in just 1 effect.

  And then use expressions on those keyframes to choose the value of key(n)

  with n being controlled by a slider or pop-up selector

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