Remember to add the animation to the object’s XML file. The animation itself needs a separate guid:
<?xml version="1.0" ?>
<ModelInfo guid="{1b970409-8112-49b7-875b-265b1bcf05eb}" version="1.1">
<Animation guid="eacd42e8-e61b-409b-8b64-6b2bcf6167b7" name="Light" type="Standard" typeParam="Autoplay"/>
</ModelInfo>
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