CorridorKey 2.0 Review: did Corridor's AI keyer actually solve green screen?

Corridor Digital's AI green screen keyer is back with a 2.0 release, and they're claiming it has solved green screen. After a decade compositing feature films, I put that claim to the test against IBK and Keylight in Nuke.

What's new in CorridorKey 2.0

When I reviewed CorridorKey 1.0, the standout feature was that it corrects edge color contamination instead of just generating an alpha like a traditional keyer. But it had real weaknesses: some shots flickered, and it fell apart completely on partial green screens unless you cropped in.

Version 2 fixes a lot of that. It now installs as a proper Nuke plugin, it handles partial green screens (it even cut me out against a white wall in a white sweater), and on the infamous pumpkin shot the edge colors and motion blur came through clean on default settings, easily beating Keylight.

CorridorKey vs IBK vs Keylight on production plates

The production plates are where it got really interesting. On a shot with a reflective metal ladder picking up green spill, CorridorKey kept the ladder on stage while giving a solid core matte and soft, detailed edges in a single pass. In a traditional Nuke keying workflow that takes a stack of IBKs, core mattes and roto. I've never seen a keyer pull green objects off a green screen before.

It also handled glowing sabers, hair and motion blur better than IBK overall, with no holes and much less edge contamination. IBK still wins on the very finest hair detail, and on feature films clients will zoom in on every strand, so I'd treat CorridorKey as a 90% starting point and key mix in detail where needed.

The alpha hint feature is the real power tool here. Feeding it a crunchy Keylight matte or a rough SAM 3 segmentation from ComfyUI cleaned up tracking markers, removed an unwanted green ramp and stabilized the edges of the set.

Where the AI keyer still struggles

It isn't flawless. On my toughest shot, with a dark shadowed green table, seams and overlapping objects, the default result flickered too much to be a one-shot solution. Even there, though, combining an IBK-based alpha hint with SAM 3 roto gave a surprisingly useful key across the dark-to-bright green cross sections, which are usually the most painful areas to roto.

Run your own tests and let me know what results you get. I'm curious whether other plates do better or worse.

Alex