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Use a Volume Shader when you want to completely control the color, transparency, and matte opacity of a volumetric material. This kind of shader does no shading calculation of any kind. Rather, it allows you to connect other attributes directly to its color, transparency, and matte opacity. It completely ignores everything else that would normally affect a volume shader.

For example, if you connect the Translate attribute of an object to the Out Color attribute of a Volume Shader, then the color of the shader will depend on the position of the object in space.

If you are connecting this node manually to a shading group, then you should connect the Out Color attribute of the Volume Shader to the Volume Material input of the the shading group. (This is sometimes called the Volume Shader input.) (Most other shaders connect to the Surface Shader input.)

In the table below, important attributes have their names indicated in bold in the decription column.

This node is MP safe

Node nameParentsClassificationMFn typeCompatible function sets

Related nodes

lambert, reflect, phongE, phong, blinn, anisotropic, simpleVolumeShader, surfaceShader, displacementShader, layeredShader, useBackground, defaultShaderList, shadingMap

Attributes (12)

outColor, outColorB, outColorG, outColorR, outMatteOpacity, outMatteOpacityB, outMatteOpacityG, outMatteOpacityR, outTransparency, outTransparencyB, outTransparencyG, outTransparencyR

Long name (short name)TypeDefaultFlags
outColor (oc) float30.0, 0.0, 0.0outputinputconnectablestorable
Out Color. Connect another attribute to this to control the color of the volume shader.
outColorR (ocr) float0.0outputinputconnectablestorable
Out Color red value
outColorG (ocg) float0.0outputinputconnectablestorable
Out Color green value
outColorB (ocb) float0.0outputinputconnectablestorable
Out Color blue value
outTransparency (ot) float30.0, 0.0, 0.0outputinputconnectablestorable
Out Transparency. Connect another attribute to this to control the Shader transparency. Higher values (that is, brighter colors) make the object more transparent; darker colors make it more opaque.
outTransparencyR (otr) float0.0outputinputconnectablestorable
Out Transparency red value
outTransparencyG (otg) float0.0outputinputconnectablestorable
Out Transparency green value
outTransparencyB (otb) float0.0outputinputconnectablestorable
Out Transparency blue value
outMatteOpacity (omo) float31.0, 1.0, 1.0outputinputconnectablestorable
Out Matte Opacity. Connect another attribute to this to control the opacity of the material matte (alpha) channel.
outMatteOpacityR (omor) float0.0outputinputconnectablestorable
Out Matte Opacity red value
outMatteOpacityG (omog) float0.0outputinputconnectablestorable
Out Matte Opacity green value
outMatteOpacityB (omob) float0.0outputinputconnectablestorable
Out Matte Opacity blue value