Bleach Bypass - Made to simulate the effect of the "bleach bypass" process for film. Controls 0-2 modify saturation. Controls 5-7 set the amount that each channel contributes to the alpha channel, with image luminosity inverted. Control 3 reduces the overall transparency by adding to alpha values. The lowest image values are the first to become opaque. The full dynamic range of the image is preserved, except where clipping to white. Use with a white layer or solid below the image layer.