Yeah, something else there. Smartfill doesn't make anything special, it just creates an object, just like every other object. The typical way I use Smartfill is to click on a bunch of small objects in something and then I weld them all together, so I end up with one shape for a larger object.
But overall, it doesn't create anything special that would cause any issues sending it over. It's simply a tool used to create objects. If I can find a good example of where I'd use it, I'll screen capture it and make a video to show you.