Variable saturationConst

saturation: PointwiseFilter<
    {
        amount: {
            default: 0;
            description: "-1 removes all colour, +1 doubles the colourfulness; 0 changes nothing.";
            label: "Amount";
            max: 1;
            min: -1;
            step: 0.01;
            type: "float";
        };
    },
> = ...