contrast

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Contrast is a utility node you can use to increase or decrease the contrast in a texture.

When you increase Contrast, you are making the light colors lighter and the dark colors darker. When you decrease contrast, you are bringing all the colors closer to the middle range. The Bias attribute is used to control where the "center" of this range is.

The Contrast node lets you control the contrast of each of the R, G, and B channels individually.

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

This node is MP safe

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

bias, biasX, biasY, biasZ, contrast, contrastX, contrastY, contrastZ, 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 that will have its contrast adjusted by this node.
valueX (vx) float 0.0 First component of Value
valueY (vy) float 0.0 Second component of Value
valueZ (vz) float 0.0 Third component of Value
contrast (c)	float3	2.0, 2.0, 2.0
Contrast controls the amount of contrast adjustment done by this node. You can adjust the contrast of the R, G, and B components individually. Increase Contrast to make the light colors lighter, and the dark colors darker. Decrease Contrast to make everything more grey.
contrastX (cx) float 0.0 The first component of Contrast
contrastY (cy) float 0.0 The second component of Contrast
contrastZ (cz) float 0.0 The third component of Contrast
bias (b)	float3	0.5, 0.5, 0.5
Bias controls the "middle point" of the contrast adjustment. Increase Bias to move the middle point upwards (more of the texture will become dark as contrast increaes). Decrease Bias to move the middle point down (more of the texture will become light as contrast increases).
biasX (bx) float 0.0 The first component of Bias
biasY (by) float 0.0 The second component of Bias
biasZ (bz) float 0.0 The third component of Bias
outValue (o)	float3	0.0, 0.0, 0.0
Out Value is the new color or texture, calculated by applying the contrast adjustment to Value.
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