vaderios said:

3d camera projection is to project an image to a 3d geometry. To have a more real look with subtle movements (im refering again to darth editous bespin shaft matte)

Since you brought it up vaderios, here's that neat Darth Editous shot for anyone that missed it - http://www.youtube.com/watch?v=H1TQ11frJ0A

Although a comparison clip would have shown the difference clearer, you can see how the walkway at the front of the Vane rises upwards in relation to the surrounding backdrop behind it....compared to the static 'zoom-in' of the original matte.

It really adds depth, and that's some great stuff that you and Jaitea have shown about all these kinds of effects.

Can't wait to see what Adywan has decided to do with his whole Vane sequence eventually....