*but sometimes camera moves are getting more and more severe.....

Yeah, a fly-over would be impossible for what I described. And that river fly-over is fantastic! What a PITA that must have been to track and add elements! Gotta check out the rest of their site, now.

The trick with Vue plants - and I only have the ones that came with Vue, not the good ones, or X-Frog - is that they look good from a distance, but don't let the viewer look too long. Just like any other FX, given just a little time,  people will start to see the imperfections and pick the shot apart.

Basically, the flyover would need to have some decent speed or you'll get too good a view of the trees - and stop paying attention to the focus of the matte.

-Lew ;-)