I am actually doing edition that uses chroma key, that is
2 videos that one will overlay the other and the one that will overlay is filmed against and green background, or a green surface (what is a green surface, was the time that the subject or actor was lying in a green table and represent being stand-up, crazy).
One interesting fact the Chroma key don’t recognize shadow or sparks or light bloom that get over the border of the object, what to do?
In a 3D software this could be rendered like an object, the 3D software recognize glitters in the scene or make shadows, the shadows will be made at the same time that you compose; in the video edition the shadows were already made, would spoil your work, so this is the reason you put shadows in the chroma key because you had to shoot the overlay scene without shadows or lights blooms they are placed after, you can make a new layer for this kind of effect.
Or in my case I use another kind of keying, one that recognizes the video overlay and now the overlay video isn’t green; the overlay clip is like light, so it could work with shadows and lights blooms, if there's wasn’t that effect that letters would not could be in the movie, the plugin make letters with shadows and light blooms, so the chroma key didn’t work, and you see the result there, I didn't use the chroma key.
Rute Bezerra de Menezes Gondim
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