[John Thames]

I just found this out:
make a slice of your ribbon 1 px in lenght
create a particle emitter from that slice
particle emitto to point
crank up the birth rate
set speed of the cell controls to zero
add motion path behaviour to the particle emittor
selct your bezier in the motionpath behavior
and that’s it.

-ps sorry for my bad english and for my short explination
I have to finish my project 🙂

[John Thames]

Check out belle nuit. https://www.belle-nuit.com/
i believe you can import a stl file and export a xml file which can be imported in FCP.

An other option is:
make a dvd with dvdstudio pro and use your stl file. After you build your dvd you can use a dvdripping software package like handbreak to rip yor own movie again+the subtitle track. It isn;t the most beautiful solution but it can be used as a last resort. 😉