Then open Blender and select the node editor, clicking on " Compositing" and "Use Nodes" in the menu below This tutorial assumes a basic understanding of using Blender, node editor and compositing.įor the tutorial we will use one of the movies released for free a few years ago by the well-known actor Jean Claude Van Damme, to which a wall has been added on the sides (because if you are not in a professional studio the green screen will probably be just a green cloth hanging on the wall or of metal supports). The transparent parts will thus show the video or the image below, which will thus define the environment in which the subject of the first movie will act. Through the technique of the chroma key a color is isolated (in our case the green of the green screen), or a particular luminance, it is removed and the area that was occupied by it becomes transparent, thus becoming part of the alpha channel. In this tutorial in English for Blender 3D, we will look at some basic concepts on how to crop an image or a movie, made with green screen, to overlay it on another image or movie.
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