Free Nuke 6 Gizmo: ScreenXchange Green Screen Edge Replacement (Daniel Gonzalez S)

Overview

ScreenXchange by Daniel Gonzalez S does not output a matte; instead it replaces a green or blue screen with the background using a different math than usual keying. It is meant to help retain more detail on difficult edges, using a sampled screen colour or a clean plate, with an optional matte as base key, holdout or garbage matte.

The result can be used as a new background under the regular key. Nukepedia lists it for Nuke 6.0 or later, and it is free with a Nukepedia account.