Houdini 21.0 Nodes VOP nodes

Karma Whitewater VOP node

Karma XPU compatible node for building MaterialX-based basic whitewater shader

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Since 21.0

Overview

A building block of a shader that combines volume and glossy reflection components to produce appearance of whitewater. Karma XPU currently has no support for MaterialX’s PBR nodes, so this node can instead be used to construct a volume shader.

  • Compatible with MaterialX nodes.

Inputs

Absorption

Absorption rate for the medium (rate per distance traveled in the medium, given in m−1). Set for each color component/wavelength separately. Default is (0, 0, 0).

Scattering

Scattering rate for the medium (rate per distance traveled in the medium, given in m−1). Set for each color component/wavelength separately. Default is (0, 0, 0).

Anisotropy

Anisotropy factor, controlling the scattering direction between -1.0 and 1.0. Negative values give backwards scattering, positive values give forward scattering, and a value of 0.0 (the default) gives uniform scattering. Note that values smaller than -0.8 and greater than 0.8 tend to produce fireflies.

Scattering direction lets you control the look of volumes. Forward scattering, for example, is typically used for white clouds and smoke. Backward scattering is normally seen with solid materials like marble.

Reflect Color

Tint glossy reflection component.

Reflect Roughness

Roughness of glossy reflection component.

Gradient

World space normal input used by the glossy reflection component.

Outputs

out

volumeshader

See also

VOP nodes