The paradigm has changed. You now “publish” your Motion projects to Final Cut Pro, and depending on what type of project it is – title, transition, effect or generator – it will show up in the appropriate Browser in FCP X.
Currently no ability to send video clips to Motion in FCP X.
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Mark Spencer
Freelance Producer/Editor/Motion Graphics Artist
Apple-certified Master Trainer
Author, Motion 4 from Peachpit Press
https://www.applemotion.net