public ContrastAdjustmentFilter setScales(float redScale, float greenScale, float blueScale) {
        setRedScale(redScale);
        setGreenScale(greenScale);
        setBlueScale(blueScale);

        return this;
    }
Adjusts the output scaling for each color channel.
The default for each scale factor is 1, which has no effect.

@param redScale the red-channel scale factor
@param greenScale the green-channel scale factor
@param blueScale the blue-channel scale factor
@return this filter instance, for chaining
jme3-effects/src/main/java/com/jme3/post/filters/ContrastAdjustmentFilter.java