Variable grayscaleConst

grayscale: PointwiseFilter<
    {
        amount: {
            default: 1;
            description: "Blend between the original colour (0) and full grayscale (1).";
            label: "Amount";
            max: 1;
            min: 0;
            step: 0.01;
            type: "float";
        };
        method: {
            default: "luminance";
            description: "How brightness is computed. Luminance weighs colours like the eye does, Average takes the mean, Max takes the brightest channel.";
            label: "Method";
            options: {
                average: "Average";
                luminance: "Luminance (Rec. 709)";
                max: "Max";
            };
            type: "enum";
        };
    },
> = ...