[Peter Jogren]

Hi there!

I can see that this is an old question, so I guess you guyes already solved
the “problem”.

For those of you finding your way to this thread – here you are:

In FCP you have to go to Sequence > Settings ( or hit command + 0 )
Then choose the Render Control tab.
In the “Master Templates and Motion Projects” square, choose Best Quality.

This will tell FCP to render the motion blur you´ve applied in Motion. It will
also add to the number of coffecups you´ll have a day as render times will
increase dramatically 😉

/Jogren