gammaCorrect

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Gamma Correct is a utility node that allows you to do gamma correction on a color or texture.

Gamma Correction allows you to smoothly remap the colors in an image. Extreme values (very light or very dark) will not change much, but midrange tones can be made brighter or darker.

This node allows you to specify different gamma values for the three channels of the input.

The typical formula for calculating gamma is:

     new == old ** (1.0/Gamma)
 

In the table below, important attributes have their names listed in bold in the description column.

This node is MP safe

blendColors, clamp, lightInfo, surfaceLuminance, contrast, luminance, rgbToHsv, hsvToRgb, samplerInfo, setRange, resolution, renderQuality, renderGlobals, renderGlobalsList, baseShadingSwitch, singleShadingSwitch, doubleShadingSwitch, tripleShadingSwitch

gamma, gammaX, gammaY, gammaZ, outValue, outValueX, outValueY, outValueZ, value, valueX, valueY, valueZ

Long name (short name)	Type	Default	Flags
value (v)	float3	0.0, 0.0, 0.0
Value is the input color or texture, which will be gamma-corrected.
valueX (vx) float 0.0 The first component of Value
valueY (vy) float 0.0 The second component of Value
valueZ (vz) float 0.0 The third component of Value
gamma (g)	float3	1.0, 1.0, 1.0
Gamma controls the amount of gamma correction applied to each channel. A value of 1 means that the the color is not adjusted at all. Increase Gamma to make the mid-range tones brighter. Decrease Gamma to make them darker.
gammaX (gx) float 0.0 The first component of Gamma
gammaY (gy) float 0.0 The second component of Gamma
gammaZ (gz) float 0.0 The third component of Gamma
outValue (o)	float3	0.0, 0.0, 0.0
Out Value is the gamma-corrected color calculated by this node.
outValueX (ox) float 0.0 The first component of Out Value
outValueY (oy) float 0.0 The second component of Out Value
outValueZ (oz) float 0.0 The third component of Out Value