Use the anisotropic shader to control the specular effect of the highlights.
- X Roughness field
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Displays the shape of specularity of the shader along the X axis.
- Y Roughness field
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Displays the shape of specularity of the shader along the Y axis.
- Fresnel Offset field
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Displays the total amount of specular light.
- Fresnel Factor field
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Displays the amount of specular light at grazing angles.
TipTo cancel out the Fresnel effect altogether, set the Fresnel Offset to 0 and the Fresnel Factor to 100.