PBR² is a fully-implemented surfacing shader built for physically based rendering (PBR).

That’s not all though! PBR² offers additional parameters that give artists artistic control over any project that they are working on.

• Surface Color: The albedo/diffuse color of the surface of the material.
• AO: Ambient occlusion.
• AO Strength: Strength multiplier for ambient occlusion.
• Surface Roughness: Roughness of the surface of the material.
• Surface Normal: Normal vector of the surface of the material.
• Metallic: Metallic areas of material.
• Rim Color: Effects the fresnel color on the edge of metallic materials.
• Rim Strength: Effects the strength of the rim color.
• SSS Color: Color of the SSS shader.
• SSS Strength: Strength of the SSS shader.
• SSS Texture Blur: Texture blurring properties of the SSS shader.
• Clearcoat Roughness: Roughness of the clearcoat on top of the material.
• Clearcoat Reflectivity: Opacity/strength of the clearcoat.
• Clearcoat Normal: The normal vector of the clearcoat.
• Transparency: Mixes in transparency with the material.
• IOR: Index of refraction for refractive materials.
• Displacement: The physical displacement of the material.
• Displacement Strength: Strength multiplier for displacement.