Alembic importation in Unreal

Development Asset Creation
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1

Hello,

I’m having an issue importing Alembic files into my Unreal Engine project.

I created a fluid simulation in LiquidGen and exported it as an .abc file. However, I’m unable to import any Alembic file into Unreal, whether it’s a large file (~9 GB) or a much smaller one (~150 MB). The import process always gets stuck at 0%, and Unreal eventually freezes.

What I’ve tried so far:

  • Importing different file sizes

  • Re-exporting the Alembic from LiquidGen

  • Checking that the file works (I can import it without any issue in Blender)

So the file itself seems valid.

Does anyone know what could cause this issue in Unreal, or how to fix it?

Thanks a lot for your help!

2

Hello there @Vaanelle!

That’s quite bizarre, UE should give you some form of response when importing the file. I would start with ensuring that the whole importer workflow is being followed. For that, you can review Epic’s doc:

I would also recommend defaulting the settings in both UE and Blender, to ensure you start from a clean slate. Additionally, you can check the following video guide that covers the entire process.

If the issue persists even after securing all the workflow, check if any output log is generated on the engine side when it freezes/crashes. That should give us a clue of what’s going on.