How to key out a white background in compositor? I've been trying for hours to remove my white (well, grayish white) background from a video, and I thought you could remove it with keying nodes in the compositor (cycles).  I managed to get somewhat close, but it still has pieces of white, and it affects the colour of my sunglasses.  I've tried tutorials meant for green screens, keying/chroma/difference/luminosity nodes, but I just can't figure out the right settings.  Core matte mask helped a little, but made it impossible because my body moves in the video.  I played around with the keying colour a lot, and nothing seems to help.
Is this possible or is a green screen absolutely necessary?
I've attached the .blend file with a screenshot rather than the whole video due to file size, but I imagine it's the same principle.
Here's a screenshot of the original image:

Here's the node setup:

Thanks in advance!
as you can see, with this setup you get pretty far.
Of course you should mask out roughly your body before, so that it won't &quot;hurt&quot; your face ;)