Animation Render Stuck When Exporting with LottieFiles for AE Plugin

Why is my animation stuck on rendering?

If your animation is stuck during rendering, there are a few common issues you can check:

Plugin version

Make sure you’re using the latest version of the LottieFiles for After Effects plugin. You can download the latest version here. Updates often include important bug fixes and improvements.

File size

Large files can take longer to render. If your animation is over 1MB, give it a few minutes to complete the render.

Composition duration

Your animation should be at least 3 seconds long. Shorter compositions may not render properly.

Unsupported features

Your animation might include features that are not supported by Lottie. Check the full list of supported and unsupported features on this page.

Track mattes

After Effects has a known issue with track mattes that can affect rendering in Lottie. To work around this:

• Use a separate track matte layer for each element you want to apply a matte to.
• Keep the track matte layer directly above the layer you’re applying it to.

You can also watch a video guide created by one of our Motion Designers here.

Merge paths

Make sure your composition does not include Merge Paths. If it does, remove them before rendering.

Adobe Illustrator (.ai) files

When using Illustrator files, export them as compositions in After Effects and convert them into shape layers. This makes them compatible with Lottie.

PNG sequences

Large PNG sequences can slow down rendering. Try optimizing the sequence for better performance.

Nested compositions

Check for nested compositions inside your main comp. Too many nested comps can impact rendering. Flatten or pre-render them if possible.

Third-party character tools

Lottie does not fully support character rigging tools like Duik, Limber, or RubberHose. A common workaround is to bake the keyframes. This means converting expressions to keyframes and using a script like Baked Parented Transform to apply keyframe data to parented layers. This method can work but may vary depending on how complex your animation is.

If you’ve tried the suggestions above and are still having trouble, please contact our support team. To help us assist you faster, include the following information in your message:

• Your Adobe After Effects version
• Your LottieFiles plugin version
• Your operating system
• Your source file (.aep)

Email us at support@lottiefiles.com and we’ll do our best to help you get things running smoothly.

Updated July 17, 2025 14:00