Sheen Specular VEX node

Generates a color using a specular lighting model with a Fresnel falloff calculation.

All

Inputs

Outputs

Examples

This vop uses a specular lighting model with a Fresnel falloff calculation to generate a color. Typically, adding this lighting model into the network, is the last thing done before connecting the resulting color to the output Cf input.

Inputs

nN	The normal vector is used in the sheen calculation. The normal should be normalized if explicitly connected as an input. The face forward calculation is optional but recommended. Implicitly, the normalized global variable, N, is used.
nI	The incidence direction ray used in the selected sheen calculation, as well as, the face forward calculation. The incident vector should be normalized if explicitly connected as an input. Implicitly, the normalized global variable, I, is used.
Sheen Intensity	A floating point value used to darken or lighten sheen highlight.
Sheen Color	The sheen highlight color. It is multiplied by the light color.
Index of Refraction	This value is the ratio of the speed of light in one medium, such as air, to that of another medium. This determines how much the ray bends as it passes into another material. In this context, it effects the amount of specular visible on the front of the surface. Higher values tend to "push" the specular towards the edges.
Roughness	A floating point value used to control the size or spread of the sheen highlight.
face forward	This toggle will change the normal to face forward towards the camera. It is recommended this toggle be on.

Outputs

Color	The sheen highlight calculation, Ksheen sheenColor * sheen(nN, nI, eta, urough)*.
Illum	The sheen lighting without the multiplication by the sheen intensity or the sheen color. Usually used as an export parameter for extra images planes used in the composite.
BSDF	The PBR sheen calculation.

Examples

Grass
Skin

Usages in other examples

Example name	Example for
FurBallWorkflow	Fur surface node	Load \| Launch