This was a big pan shot that had two things to track: the framed image of
Dr. Davis and the "rolling hills of Thunder Bluff" (contrary to the voice
commentary, the Tauren in question actually frolic in their underwear as
opposed to the nude)
The image of Dr. Davis had already been scaled and color corrected because
it was used in a previous shot. These two shots were filmed together with
the camera on a tripod so that the position and lighting did not change. Kevin
exported the bit of the tree involving the frame and Dr. Davis from the
Shake script for the "Moving Sound Booth", so it only required minor tweaking to
accommodate to the new shot.
The image was tracked using a single point MatchMove. Initially, the image
was tracked to the uppermost blue tape that we had added to the wall. As
the camera pans in this shot, that blue tape goes offscreen. When it does,
Kevin offset the tracker to begin tracking from the corner of one of our
"trendy lights".
As the camera continues to pan, we come to the raised loading door
revealing Thunder Bluff on the outside. This video was obtained from the
game World of Warcraft (Thunder Bluff is a city in the game and Tauren are
the bovine race who live there). Kevin logged into the game and positioned his
character in such a way that it would make a good composition when
composited with the video of the DPA lab. Then he made his character dance
while he positioned the camera. Once happy, he was able to record an
in-game movie that could be imported into Shake.
Once the Thunder Bluff shot was in Shake, it was color corrected and tracked.
Since the camera was panning, the roto shape would have to be made to
match the pan. Kevin was also able to track the roto shape instead of manually
animating it frame by frame. He did this using the same technique developed for the "Falling Professor" shot.
That process was to make the roto shape and position it correctly on a
single frame. It was then tracked using a single point MatchMove. In the
MatchMove node, the rotoshape was placed in the foreground and the source
video was placed in the background.
The result of that MatchMove was then plugged into the Mask input of a
copy of the background video using "Inside" instead of "Over". That created
an output that contained the source video with a roto shape tracked to it.
That output was then combined with the tracked background plate of Thunder
Bluff and the Dr. Davis frame for the final composite.