Green screening with Blender

For our animation we used a green screen so that we can act out the action and then use 3d modeling software such as maya and blender to recreate the actions to use in out animations. To separate me from the background I used blender 2.8 since the software I used to edit videos (Hitfilm) didn't have the tools to do it.

So I used blender to remove the green around me and replaced it with alpha. Since the camera captured more than just the green screen there were still stuff at the sides, so to remove that I simply created a mask with the mask tool around the green screen and plugged the channel key (To remove the green) in to a multiply node to remove everything that wasn't in the green screen. As unfortunatly blender isn't the best tool to do this in it took a whole day to render the 7500 frames (@ 25fps, ~5 minutes of video).


To conclude, I think that blender still has room to improve on 2D video rendering as it also rendered the 3D view too even though there wasn't a need to. One good thing about blender's compositor is that it used a node based workflow so it's easy to and and remove effects.

The Mask