Thanks for the tips. I’m already on board with optimizing stills before import, but it’s good to know about rendering workflow.
I imported the sequence of the project I finished in FCP and checked it out in Motion. It was, frankly, a mess. I suspect that Motion doesn’t like nested sequences. The project was huge, and in some cases the keyframes for certain motion parameters were totally out of whack. For example, one group that occurs about a minute into the piece had its motion keyframes right at the beginning. Crossfades didn’t survive the translation, as there were no opacity keyframes. Also, in some places a clip or still was split over two different groups, seemingly arbitrarily.
I’m guessing that it would be much better to start a project in Motion by importing the finished audio track and then building everything on top of it within the application rather than trying to import FCP sequences.