An article at VFXWorld about previs includes word on Halon's Ghost Rider work, along with pictures:
However, near the end of War of the Worlds, Halon received its first outside client: Ghost Rider, starring Nicolas Cage and based on the Marvel comic. For that project, Halon dispatched four staffers to Melbourne, Australia. They worked on it for three months, allowing Halon to get started on the ground with hardware and software and without having to borrow money.
You can check out the full article at the link above.
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