Houdini 20.0 Nodes VOP nodes

PBR Hair Primary Reflection VOP node

Produce a hair BSDF.

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Since 12.0

This node will produce a BSDF for rendering the primary reflection of hair. Typically, this node should be combined with secondary reflection and transmission components.

The Hair Model VOP combines all three BSDFs to get the overall hair effect.


Component Label

Specifies a label for the BSDF component. This can be used to export contributions from this component to a separate image plane.

Reflection Color

The reflectivity of the color components (red, green, and blue). For example, specifying 1 0 0 results in the reflection of red light only.

Reflection Size

Controls the angular spread of the reflection. Low values result in reflection over a narrow cone of angles, and high values result in reflection over a broader cone.

Reflection Shift

Controls the general direction of the reflection. Values range from -1 (towards the hair’s root) to 1 (towards the hair’s tip). A value of 0 results in a direction perpendicular to the hair. The effect of this parameter is most noticeable with a small reflection size.



Normalized surface normal.



The reflection BSDF.

See also

VOP nodes