Answers.Body: <p>It's because of spatial interpolation.  Here's a previous answer:</p>
  
  <p><a href="https://video.stackexchange.com/questions/14687/object-moving-to-a-position-i-didnt-specify/14697#14697">Object moving to a position I didn&#39;t specify</a></p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2015-05-07T09:58:41.070Z
Answers.LastActivityDate: 2015-05-07T09:58:41.070Z
Answers.LastEditDate: 2017-04-13T12:46:08.110Z
Answers.UserDisplayName: tomh
Body: <p>I have an animation in After Effects where I am animating a slider to move up and down at certain points. The slider should be mainly stationary, but moves occasionally in line with other actions on the project.</p>
  
  <p><img src="https://i.sstatic.net/sK56t.png" alt="enter image description here"></p>
  
  <p>What I am finding though, is the slider is moving a small amount even when the keyframes are set such that it should be static. E.g. the following two keyframes are the same (Y position = 524.6) but if I move the marker in between, you'll see the value deviates from this. (As a result the slider moves.)</p>
  
  <p>1st Keyframe (Y Position = 524.6):
  <img src="https://i.sstatic.net/yZrVb.png" alt="1st Keyframe"></p>
  
  <p>2nd Keyframe (Y Position = 524.6):
  <img src="https://i.sstatic.net/5EJFt.png" alt="2nd Keyframe"></p>
  
  <p>In between (Y position varies, up to 525.4):
  <img src="https://i.sstatic.net/ihVtB.png" alt="In between"></p>
  
  <p>This is driving me nuts! As far as I can see the anchor point does not move, so I don't understand why this should happen.</p>
  
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2015-05-06T16:07:56.137Z
Comments.Text: Do you have a splined move between the keyframes?
Comments.UserDisplayName: Jim Mack
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2015-05-06T16:30:07.357Z
Comments.Text: What is a splined move? ;-) (Possibly - how do I tell?)
Comments.UserDisplayName: Ben
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2015-05-06T17:11:47.820Z
Comments.Text: I can't give you the AE settings but when you have two position keyframes you can choose to move between them linearly or with a curve / easing / spline to smooth the motion. Sometimes even when the positions are the same, the tension of the spline results in a bump.
Comments.UserDisplayName: Jim Mack
Tags: <after-effects>
Title: Ghost position keyframes in After Effects
UserDisplayName: Ben
ThreadText: # Ghost position keyframes in After Effects
  
  (Asked by: username_0 on 2015-05-06)
  
  I have an animation in After Effects where I am animating a slider to move up and down at certain points. The slider should be mainly stationary, but moves occasionally in line with other actions on the project.
  
  ![enter image description here](https://i.sstatic.net/sK56t.png)
  
  What I am finding though, is the slider is moving a small amount even when the keyframes are set such that it should be static. E.g. the following two keyframes are the same (Y position = 524.6) but if I move the marker in between, you'll see the value deviates from this. (As a result the slider moves.)
  
  1st Keyframe (Y Position = 524.6):
  ![1st Keyframe](https://i.sstatic.net/yZrVb.png)
  
  2nd Keyframe (Y Position = 524.6):
  ![2nd Keyframe](https://i.sstatic.net/5EJFt.png)
  
  In between (Y position varies, up to 525.4):
  ![In between](https://i.sstatic.net/ihVtB.png)
  
  This is driving me nuts! As far as I can see the anchor point does not move, so I don't understand why this should happen.
  
  **Tags:** after-effects
  
  > **Comments:**
  > **username_1**: Do you have a splined move between the keyframes?  
  > **username_0**: What is a splined move? ;-) (Possibly - how do I tell?)  
  > **username_1**: I can't give you the AE settings but when you have two position keyframes you can choose to move between them linearly or with a curve / easing / spline to smooth the motion. Sometimes even when the positions are the same, the tension of the spline results in a bump.  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_2 on 2015-05-07. Score: 2 | Accepted answer
  
  It's because of spatial interpolation. Here's a previous answer:
  
  [Object moving to a position I didn't specify](https://video.stackexchange.com/questions/14687/object-moving-to-a-position-i-didnt-specify/14697#14697)
  
  
  ---
  
  