View Full Version : How are movie scenes frozen in 3D?

09 September 2010, 08:26 PM
In many movies there are scenes that completely freeze and then have a camera moving through, or sometimes a person that isn't frozen. Is this done by actually modeling the whole scene digitally?

Here's an example:

Mr. D
09 September 2010, 05:40 PM

Basically it's just a series of cameras taking images. Such as you have 20 cameras in a circle around some scene you want to freeze, say frame 20 in a action, all you need do is get frame 20 from each cameras(cameras can be a set of single frame, burst,or video/film). Played in order of camera 1-20 gives you the look of a suspended moment in time, same moment shot from numerous angles.

Mr. D

09 September 2010, 06:48 PM
Yep. It's done using a camera array, where several cameras are arranged on a track that will simulate the dolly of a moving camera. All the cameras take their picture at the same time so they all get the same moment in time from different angles. It's usually referred to as time slicing, I believe:

09 September 2010, 09:39 AM
However, certain things are modeled in like objects one interacts with. The movie Swordfish and the TV series Heroes behind the scenes explains a bit more about this. Swordfish explains how they did the complicated 360 time slice while Heroes explains how they made Hiro stop time.
Both are great things to watch if you're interested in that stuff.

09 September 2010, 10:38 PM
isnt there a faster way to do that with after effects?

09 September 2010, 02:28 AM
This is a similar idea of a time freeze using after effects.

09 September 2010, 04:28 PM
Okay, so in the example I gave the main character was a 3D model? Or is it more probable that they just used a blue screen and layered him on to the footage from the other camera's stitched together frames?

I hope I'm not being repetitive, I'm at school so I couldn't watch the videos you linked.


09 September 2010, 02:25 AM
I would say it's layered footage that created the shot. Some elements like the popcorn were 3D but for the most part it's overlapping footage. Maybe if you explain what your trying to do we can better point you in the right direction.

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09 September 2010, 02:25 AM
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