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I wouldn't expect it to support Arnold, since it's optimized for VRay and it's from the Chaos Group.
Doesn't it support Alembic and OpenVDB for compatibility?
I got it to work with Arnold. For vdb follow this guys post.
https://answers.arnoldrenderer.com/questions/2799/reading-phoenix-vdb-and-make-it-work.html
Stand in's export works for particles and alembic works for meshes. @Renato Paulino