Vignettes are a common effect that take way too long to not have it’s on node group. To bring this into another scene just go append, select the file, choose node group, and select Vignette. Then in your scene in the compositor just go Shift-A and add group< Vignette. Power is just how strong the Vignette is.
Thanks for sharing but i don’t think this belongs in Tests?
Thks @PhoenixSmith for your job and generousity.
Thanks guys! Where would it belong better?