A movie in which the back side of the movie CG is seen for a while

You can see a few backgrounds and objects that can only be seen as real objects in the state before completion. Recent images are made with CG to such a place, are not they?

Details are as below.
A site of people who took charge of the video effects of "Da Vinci Code" and "X-MEN 3". You can see LARGE or SMALL.
Jose Burgos


Bonus
Technology introduction movie of Pixel Liberation Front dealing with images for pre-confirmation of special effects. "Previs - Postvis" introducing the confirmation image and the image after completion separately from the top is fun.
Pixel Liberation Front - Previsualization - Visual Effects