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View Full Version : Compositing 2d Matte Painting to Live Video

Vwaza
05-16-2007, 07:41 AM
What is the best advice you can give dealing with 2d Matte Painting and live video?

The live video is a mountaineous range (like Grand Canyon for example), the Matte Painting is a 2d (TIFF Hi-res) of landscape background and city (a 3d city model will be added to this matte/video combination).

How do you combine these elements? Can you combine 2d matte painting and live video in compositing programs like Shake or Combustion? What is the process?

Thanks in advance.
pgraham
05-17-2007, 01:45 AM
I'm assuming you're asking about tracking the background, not about pulling a matte from the video layer.

In shake, use a Stabilize node with 4 track points to track the background of the footage. The 4 point method will give you the best result if your camera pans and the background has perspective distortion. 1 point only gets translation, 2 points gets rotation and scale but not perspective. Use the refFrame parameter to pick when in the footage you want your painting to be at its default position.
Vwaza
05-17-2007, 05:01 AM
I'm assuming you're asking about tracking the background, not about pulling a matte from the video layer.

In shake, use a Stabilize node with 4 track points to track the background of the footage. The 4 point method will give you the best result if your camera pans and the background has perspective distortion. 1 point only gets translation, 2 points gets rotation and scale but not perspective. Use the refFrame parameter to pick when in the footage you want your painting to be at its default position.

Thanks pgraham, actually I did have that question some months ago (not on CGS) and your advice does gives sense - I will check it out.

However, my question now is: I have a 2d Matte Painting image (TIFF Hi-res) which I would like to combine with a live video of a mountain landscape.

What is the best approach of achieveing this. Thanks again for your time.
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