• Adobe After Effects Expressions

  Controlling Blurriness via Scale from Another Layer

  Posted by Justin Sum on November 18, 2018 at 7:19 am

  Hi there. I’m trying to proportionally scale an adjustment layer’s fast blur blurriness, to a different layer’s scale. I have a simple if/else expression on the adjustment layer with the blur effect, and a bunch of layers beneath it. The layer that scales up is attached with a slider control for scale, above it the adjustment layer so that it is unaffected by the blur.

  if(thisComp.layer(“middle block”).effect(“Slider Control”)(“Slider”) > 101) 5 else 0;

  here’s what it gives me:
  

  This is the look I want, however, I want the blurriness to scale in proportion to the increasing scale based off of two keyframes: 100%-130%. Right now the blurriness is going straight from 0 to 5 when the scale is above 101. If I wanted the blurriness to run proportionally from 0 up to 5, as the scale goes from 100% to 130%, how would I go about that?

  P.S. disregard the creepy sounding text, it’s a translated lorem ipsum text I found online.

  Thanks

  Justin Sum replied 7 years, 8 months ago 2 Members · 2 Replies
• 2 Replies

• 

  Dan Ebberts

  November 18, 2018 at 8:05 am

  Like this:

  s = thisComp.layer(“middle block”).effect(“Slider Control”)(“Slider”);
  linear(s,100,130,0,5)

  Dan
• 

  Justin Sum

  November 18, 2018 at 8:25 am

  Oh wow that’s so simple haha. I had no idea about linear, I’ll have to look into it more. It works perfectly.

  Thanks Dan!

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