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What Import Format Supports Time-Varying Arbitrary Attributes?

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    What Import Format Supports Time-Varying Arbitrary Attributes?

    Hi everyone, I'm wondering if someone here can help me out. I have been tasked with displaying data from a simulation in a VR environment using Unreal. the output from the simulation is essentially points, with data attached to them that varies over time. Obviously point data varies over time, but I'll need to process arbitrary point data. So, I need to get this data into Unreal and manipulate it, so I wanted to choose a format and I see the following options:
    Supports
    Arbitrary
    Attributes
    Animation
    Cache Works
    in Unreal
    Unreal can Access
    Arbitrary Output
    GLTF yes no no
    FBX yes ? ?
    Alembic yes yes ?
    USD yes yes ?

    Can anyone help me with the '?' entries? Or shed any light on any of these I'd be very grateful. The closest I've gotten at the moment to verifying anything is being able to observe existence of arbitrary data in the USD Stage property viewer, but I do not know if the animation of these attributes is intact.
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