grayscale
Turn the child black and white, weighted the way the eye sees brightness.
grayscale(): PointwiseEffect
Import effects from shaders/std and use effects.color.grayscale.
Alpha kept.
Example
effect: grayscale()
See also
saturate— Scale the child's saturation.duotone— Repaint the child in two colors:colorAfor the shadows,colorBfor the highlights.