USD file from Blender 4.0 appears "empty" when imported in UE 5.5

Development Pipeline & Plugins
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1

Hello,

I hope someone could help me.
I’m trying to import an USD scene modelled in Blender 4.0 into a UE 5.5 project and after the usual set up to enable USD (USD plugin, open USD stage, USD cache generated) I tried to open my USD scene, UE generates the UsdStageActor# but it’s completely empty, nothing shows both in the Stage panel and in the submenu in the main library above the stage panel.

I’ve used this workflow before in UE 5.3, where I’ve imported similar scenes exported from Blender the same way with no issue. I’ve also tried to open the same USD scene in a new blender file and the meshes are there and I’ve impoirted previous USDs in my UE 5.5 project and all seems to work fine (so it doesn’t seems to be a version’s issue).

I’ve tried to export in different location (both local and external), I’ve tried combinations of settings, I’ve tried to re-import into a new blender file and export again from there, I’ve checked all the meshes in blender to avoid problems due to normals, repeating vertices etc, I’ve tried to make new UE projects (both in 5.5 and in 5.3) and import…nothing seems to work.

It’s only static meshes, no materials, no lights, as I like to work on those in UE, and no animations since I don’t need them, so the scene is relatively simple.

If anyone could give me a hint of what to check both in Blender and in UE to solve this, I would greatly appreciate! Let me know if you need any additional and specific info to help understanding where the issue originates from.

Thanks in advance.

2

CAn you share the UE log from you trying to load the USD in the stage actor?
By any change, can you share your USD files?

3

Hello Flavien,

Thanks for your reply. What would be the best way to share the USD files with you?

For the log, I assume you mean the message log with errors, but in that case, I’ve checked and the only reported errors are about a missing FBX of the same model that I tried to import instead of the USD, but wasn’t good to work with so I’ve eliminated it.
The only related error I have is from when I tried to go back to 5.3 and import again when I thought it might have been a new version issue with 5.5 and the error shown was: “TF_DIAGNOSTIC_RUNTIME_ERROR_TYPE: Failed to open layer @ file name and path on disk @”.
Also, would a screenshot of the log message suffice?

In case you meant something different, do you mind explain it briefly; apologies, but I’m new to UE and still learning, especially the more technical sides and details.

Thank you very much for your help and patience with this newbie, I’ll be waiting, ready to provide files and info accordingly to what you need.

Speak soon.