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The Hair Model VOP combines all three BSDFs to get the overall hair effect.
The secondary reflection differs from the primary reflection as it provides additional controls for glints. Glints are sharp highlights that occur in pairs around the hair’s axis.
Specifies a label for the BSDF component. This can be used to export contributions from this component to a separate image plane.
The reflectivity of the color components (red, green, and blue). For
1 0 0 results in the reflection of red light
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.
Controls the general direction of the reflection. Values range from
-1 (towards the hair’s root) to
1 (towards the hair’s tip). A
0 results in a direction perpendicular to the hair. The
effect of this parameter is most noticeable with a small reflection
The relative intensity of the glints, compared to the reflection lobe. This parameter gives you independent control of the glint and overall reflection intensities.
Controls the angular spread of the glints. Low values result in reflection over a narrow cone of angles, and high values result in reflection over a broader cone.
Controls the angular separation of the glints. Values range from
0 (glints overlap) to
1 (glints point in opposite directions).
Normalized surface normal.
The reflection BSDF.