The ColorScale filter applys a color to the render image. You can use this filter to tint the render according to one particular color without change any material (underwater scene, night scene, fire scene) or to achieve fade-in/fade-out effect.
Allow to set the color to apply. Default is red.
Allow to set intensity of the color. Default is 0.7f. Frag shader clamps color intensity between 0 and 1.
@H , what about extend it with Night Vision effect?
Multiply everything with green colour i.e. (0.0f, 1.0f, 0.0f) vector, for example.
Or even calculate luminance.