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Cheezen
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November 10, 2016
Answered

Broken graph/curve

  • November 10, 2016
  • 1 reply
  • 10537 views

Hi!

I've been having this issue for quite a few versions and I couldn't find anything in the forum regarding this, which makes me confused. Occasionally I get broken curves in between keyframes for some reason, not quite sure why. Now for example I created a shape, set a keyframe at 01:00 and 04:00 and added a few extra keyframes in between (all linear still). When they were added I saw that the curve wasn't linear when I previewed, it gets this zig-zag applied to it.

Since I couldn't find anything about it it's either a bug or I'm stupid to understand why. I know my colleague has the same issue. Anyone know's how to fix it any why it appears?

Thanks in advance!

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Correct answer Roei Tzoref

it's called the boomerang effect. basically when you have bezier handles to position keyframe, you could run into situations where the motion should be static but the bezier handles create unwanted motion. more about it here:

if it's after the fact: select the two keyframes that you have the in between unwanted motion and select keyframe interpolation

choose linear for spatial interpolation:

here's my advice first thing I do when I teach after effects is go to preferences and tell my students to set the default to linear under preferences->general. I do this also in any system I am working on.

this can save so much trouble. if I want bezier I will create it myself thank you

1 reply

Roei Tzoref
Roei TzorefCorrect answer
Legend
November 10, 2016

it's called the boomerang effect. basically when you have bezier handles to position keyframe, you could run into situations where the motion should be static but the bezier handles create unwanted motion. more about it here:

if it's after the fact: select the two keyframes that you have the in between unwanted motion and select keyframe interpolation

choose linear for spatial interpolation:

here's my advice first thing I do when I teach after effects is go to preferences and tell my students to set the default to linear under preferences->general. I do this also in any system I am working on.

this can save so much trouble. if I want bezier I will create it myself thank you

    Dave_LaRonde
    Dave_LaRonde
    Inspiring
    November 10, 2016

    ....OR.....

         You can close the Graph Editor, highlight the layer in question, and simply fix the Bezier Handles on the position path keyframes in the Comp window.  That's how I do it.

      Roei Tzoref
      Roei Tzoref
      Legend
      November 10, 2016

      this is possible but I find it user error prone. you have to contract 4 bezier handles that are on top of each other. it's too easy to mess it up.

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