The Sheen material layer node provides parameters to layer metallic characteristics on top of an existing material. You can connect it to an existing MaterialThe representation of the surface or volume properties of an object.'s Material Layer input pin (figure 1), or combine it with other Material Layer types using a Layer Group node.
Figure 1: The Sheen Layer node adds edge highlights to the existing Diffuse materialUsed for dull, non-reflecting materials or mesh emitters.
Sheen - Determines the sheen highlight's color.
Roughness - Determines how much the sheen spreads across the surface. A value of 0 simulates a perfect smooth reflective surface, like a mirror. Increasing the value simulates microfacets in the surface that cause the reflective highlights to spread.
Bump - Creates fine details in the surface's sheen area by using a Procedural or Image texture. When you connect a Greyscale texture to this parameter, light areas look like protruding bumps, and dark areas look like indentations. You can adjust the Bump map's strength by adjusting the Image texture's Power or GammaThe function or attribute used to code or decode luminance for common displays. The computer graphics industry has set a standard gamma setting of 2.2 making it the most common default for 3D modelling and rendering applications. values. These attributes are covered in more detail in the MediumsThe behavior of light inside a surface volume described by scatter, absorption, and transmission characteristics. topic of this manual.
Normal - This also creates fine details in the sheen area. A Normal map is a special type of Image texture that uses red, green, and blue color values to perturb the surface normals at render time, giving the appearance of added detail. They are more accurate than Bump maps, but require specific software, such as ZBrush®, Mudbox®, Substance Designer, Xnormal, or others to generate.
Layer Opacity - Controls the Coating layer's transparency with a value or a Greyscale texture.