Controls the intensity of the vignette effect (default: 0.5)
If false, the effect will be bypassed (cheap).
Controls the outer radius of the vignette effect (default: 0.8).
Controls the shape. 2.0 = elliptical, 6.0+ = rounded rectangle (default: 2.0)
ReadonlytypeUnique string identifier for the effect.
Vignette effect parameters.