clamp

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Clamp is a utility node that can be used to keep a color value within a specified range. Input values outside the range are "clamped" to the allowed range.

For example, if you set MinR to 0.3 and MaxR to 0.6, here are the outputs you would get for various inputs:

 InputR:    0.1   0.2   0.3   0.4   0.5   0.6   0.7   0.8   0.9
 OutputR:   0.3   0.3   0.3   0.4   0.5   0.6   0.6   0.6   0.6
 

You can also use this node to clamp individual values (not just colors) to a specified range. To do this, just attach the value to one of the R, G, or B channels of the input (e.g. Input R or Input G).

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

This node is MP safe

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

input, inputB, inputG, inputR, max, maxB, maxG, maxR, min, minB, minG, minR, output, outputB, outputG, outputR, renderPassMode

Long name (short name)	Type	Default	Flags
min (mn)	float3	0.0, 0.0, 0.0
Min is the minimum values for the color channels that will be allowed in the output.
minR (mnr) float 0.0 Red component of Min
minG (mng) float 0.0 Green component of Min
minB (mnb) float 0.0 Blue component of Min
max (mx)	float3	0.0, 0.0, 0.0
Max is the maximum values for the color channels that will be allowed in the output.
maxR (mxr) float 0.0 Red component of Max
maxG (mxg) float 0.0 Green component of Max
maxB (mxb) float 0.0 Blue component of Max
input (ip)	float3	0.0, 0.0, 0.0
Input is the input color or texture that will be clamped by this node.
inputR (ipr) float 0.0 Red component of Input
inputG (ipg) float 0.0 Green component of Input
inputB (ipb) float 0.0 Blue component of Input
renderPassMode (arp)	enum	1
renderPassMode controls how the node affects material render passes.
output (op)	float3	0.0, 0.0, 0.0
Ouput is the final clamped value. It is calculated by taking Input, and clamping all the values that go outside the range defined by Min and Max for each channel.
outputR (opr) float 0.0 Red component of Output
outputG (opg) float 0.0 Green component of Output
outputB (opb) float 0.0 Blue component of Output