In the Set Extensions tutorial we learned a technique to add CG elements on top of a live action shot. But there are other effective ways to do this, include masking out parts and even using a green screen in the field.
In the above example, luminance keying and some masks were used to remove the sky and replace it with a destroyed city. Since our characters do not extend over the separating wall it is easy to remove the sky by masking the wall off and replacing it with our set extension.
This is a fake setup to demonstrate another possible way to remove the background. Obviously this would be even easier to remove than the white sky green keyer. Especially since it is pure green from the paint bucket in Photoshop. Of course in real life you want to add some track points as well so you can track the camera movement and I don’t mean in Photoshop.
In this example a fake green screen is painted on to demonstrate how using a small green screen in front of your actors will allow you to extend the background directly in front of your characters while maintaining the original dirt ground which makes your charcters look like they are really there. Once the green is removed a...READ MORE