How to put green screen video on a plane in Cycles All I need to do is place a video with green-screening onto a plane in a scene. Obviously, the green screen will need to be transparent. From what I understand, the video must be keyed and then exported/re-imported because Blender doesn't do keying while rendering. I seem to have successfully accomplished keying in Compositor, but now what? How do I apply it to the plane?

Most info I've found about the subject provides general guidance but doesn't describe the actual how to do it.

The scene is animated; the video must play with the rendered animation. The man will appear to be walking up the plank to the ship:
Using only the material nodes you could use the image texture's color components. With a good clean key background, just send the green value (alter contrast to taste) to a mix node and mix to transparent.



Here it is in action, with a very poor key background ;-)