Currently Being ModeratedMay 12, 2013 9:20 AM (in response to Liquatic)
You'd want to do this in Motion. You can do a Match Move which will cause the background to distort to give it the change in perspective you're looking for. Here is an example done in Motion 5. Static background image, camera dollied around model, match move created the illusion of the background moving in perspective to the model.
The details of how to do this are very well explained in the book "Apple Pro Training Series: Motion 5". It is hands on training, you actually do it yourself to learn it.
Currently Being ModeratedMay 13, 2013 1:32 AM (in response to Liquatic)
As you can see in the video above, the skyline image seems to follow the camera instead of staying in place. This is what I want to do, to place the image in one place and not have it follow you, so that you can say, peek around a corner, and see more of the image, letting you follow the image…not having the image follow you.
Ahh, ain't it the other way round??
The image stayes in place! As FCPX does not have any '3D' relation to the image you are keying, how should it know how to 'move' the background layer accordingly??
As Ben points out, Motion can do that, but I guess you will need to track the keyed source or animate the BG image, so it looks like it's static to the building you ar elooking out from..
Currently Being ModeratedMay 13, 2013 3:16 AM (in response to Liquatic)
… say, a city skyline, so that it looks like you're looking out a window to a city. …
to peek-around, you would need a depth-info (z-axis) in your compositing - which FCPX doesn't offer (M5 does).
but you can fake it, to some degree:
say, the camera moves to the right as in your example, the background has to move by the same amount.-
so, keyframe the bg pic.
problem in your case is: the movements aren't constant + the cam pans extreme, almost 90° to starting point - to track that manually is ..... tricky