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joel_4875
December 11, 2025
Question

After Effects Time Remapping Loop Out Last Frame Glitch with Snowfall

  • December 11, 2025
  • 2 replies
  • 655 views

I have precomped a 30sec snowfall over a tiff with some other layers that just turn on and off to simulate Christmas lights blinking. Went into the comp, enabled time remap, moved the last keyframe back one, deleted the last keyframe, and at the spot of the new last keyframe I now get this with lines all over it. 

 

I have cleared cache. Don't know what to do, I need this to loop for 60min.

screenshots show the glitch keyframe and the next frame before/after the keyframe

 

The first time I rendered it without even knowing it would produce the black frame unless I did the keyframe drop. So I rendered it first and discovered the black frame issue every 30 seconds - so I did the keyframe drop and now this glitch. 

2 replies

Warren Heaton
Community Expert
Warren HeatonCommunity Expert
Community Expert
December 12, 2025

Immediately after enabling Time Remapping, try jumping to the second Time Remapping keyframe, step back to the previous frame, click the Add Keyframe button, then delete what's now the third keyframe.  So, you're adding a keyfame at the last interpreted frame instead of nudging the second keyframe.


 



 

 

    Warren Heaton
    Community Expert
    Warren HeatonCommunity Expert
    Community Expert
    December 13, 2025

    Additional note:  If for some reason using a loop expression with Time Remapping with a nested Comp isn't getting the right results, there's always the approach of rendering the Comp as a QuickTime movie at Best Settings / High Quality (or Best Settings / High Quality with alpha), importing that back into the project, and then specifying the number of times that the Source Footage should loop in the Interpret Footage (File > Interpret Footage > Main... > Main Options > Other Options > Loop).  This was a common approach to loop footage with one Layer in early versions of After Effects before we had expressions.

    RobBarrett
    Community Expert
    RobBarrettCommunity Expert
    Community Expert
    December 12, 2025

    It's hard to answer without first seeing the contents of the 'Pre-comp 1' comp, but just in case, you could try extending all layers in that comp by 1 frame (so that they slightly extend past the end of the comp's duration). With luck, that might be an easy solution.

    J
    joel_4875Author
    December 12, 2025

    I did try that already as well and made no difference.  Here are a couple screenshots of the layers. There's a bunch of these lightlayers that just pop on and off so I'm not showing every single one but anyway.  

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