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Increase or decrease contrast of incoming float/color values using a linear slope multiplier.
Slope multiplier for contrast adjustment, 0.0 to infinity range. Values greater than 1.0 increase contrast, values between 0.0 and 1.0 reduce contrast. Default is 1.0 in all channels.
Center pivot value of contrast adjustment; this is the value that will not change as contrast is adjusted. Default is 0.5 in all channels.