Animating in Maya

The images below show how i tried to make it look like the spaceship was in the scene. I had to model with a still of the scene in the background with the camera attributes as the one i used to film the live footage. i had to put a floor in so that i would be able to put a shadow in that would follow the ground of the footage. i had to use a world lighting setting that used the image from the footage which picks up where there should be light. i put in some area and directional lighting in so that the shadows would look realistic to the surroundings.

once i had sorted out the scene i could start keying the motion. i tried to make it look as smooth as possible but it still looks a little to jumpy an not enough like its actually hovering.