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Green Screen Walls as Sets
I have been scouring the Creative Cow archives for help on this. I’m trying to do a subjective scene in a story about an eight year old who is told some traumatic news about his older brother. I want him to be inside the living room when he is told this news by his mother. Then I want the sound to fade out, a close up on his face, and then his POV shot revealing that the living room is fake. I.E. set pieces made from cardboard that he pushes over and they fall to the ground revealing a field that he is in.
I thought about doing actual photographed walls of the sets with rasturbate, but it proves to costly and too much time. So I thought of getting large bisqueen (sp?) or plywood sheets and painting them green and compositing the photo of the set on the green wall and motion tracking it as it falls.
Is this feasable? Or would it be easier to do it practically?
Any tips on motion tracking a big green screen square to look just like the pictured wall of the set in the scene?
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3 Replies
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I have done a bit of green screening and in my experience, the shot you want to pull off would be much easier and believeable if it were shot with actual walls. The problem with greenscreening in the shot you are talking about is the interaction with the actor and the wall. If not done exactly right, the wall will look very fake. (bad, unless this is the look you are going for) If the room you plan on shooting the scene in is not too large, you could construct 4 temp walls in the field and shoot both shots on site. That way the scene in which the actor and his mom interact matches perfectly with the walls falling, as the walls are the same. The other problem you may have with green screening the shot is that lighting will be inconsistent across the room and when the walls fall away. In order to pull a good key without too much manipulation, the lighting should be as even as possible. I don’t know what programs you have available for motion tracking, but since this is an afx forum, I imagine you want to use afx. The program is capable of such effects, but like I said earlier, It would be much easier and time efficient to simply build the set in the field.
Just my 2 cents. -
another thing. your walls are perfectly green right? and ofcourse you only wanna shot the greenscreen. so how would you track it then? you need one or two points. but that’s gonna be difficult when you have a perfecty green screen.
mayby rotoscoping your actors (who are sitting quite still) and then put the background behind it (you can make 3D borders with for example zaxwerk 3D animator so it looks more of a board then only a digital image).
Bart
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I thought about putting some kind of traceable element like an x on each corner. I just don’t want to pay for all the ink to rasturbate a lifesize wall.
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