Initial Attempt at 3D Tracking

A rought attempt at Tracking... Using Autodesk Matchmover with some basic footage from a Kodak Playsport to create virtual camera data to take into Maya. 
Automatic Tracked...  and then 3D co-ordinates taken from the strongest Tracking Points to align perspective.

Quick UFO knocked up in Maya - and some cubes as Shadow Catchers..  Scene Lit by a Directional Light...
'Use-Background' Shader created in Hypershader and applied to the cubes..  Effect of shadow seen in Render.

Final Version of Quick Test...
Lots of things to do to improve it, but its the beginning!