Specular Layer


The SpecularAmount of specular reflection, or the mirror-like reflection of light photons at the same angle. Used for transparent materials such as glass and water. layer is used for shiny materials like plastics, or clear materials like glass. Refer to the GlossyThe measure of how well light is reflected from a surface in the specular direction, the amount and way in which the light is spread around the specular direction, and the change in specular reflection as the specular angle changes. Used for shiny materials such as plastics or metals., Specular, and Universal MaterialThe representation of the surface or volume properties of an object. topics in this manual for more information.


Figure 1: Specular layer parameters


Specular Layer Parameters


Specular - The layer's coating color.

TransmissionA surface characteristic that determines if light may pass through a surface volume. - The layer's transmission color.

BRDF Model - Determines how light reflects or refracts. For more information, see the BRDF Models topic in this manual.

Roughness - The layer's roughness.

Anisotropy - The layer's anisotropy. A value of -1 is horizontal, while 1 is vertical. A value of 0 is Isotropic.

Rotation - The rotation of the specular anisotropic reflection.

IOR - The specular reflection's or transmission's Index Of Refraction.

1/IOR Map - The Index of Refraction map. Each texel represents 1/IOR. When this is empty, OctaneRender® uses the IOR value. If this is not empty, then this parameter overrides the Index Of Refraction set by the IOR value.

Film Width - Sets the film coating's thickness.

Film IOR - Sets the film coating's Index Of Refraction.

Thin Layer - Makes the layer very thin so it reflects, or goes straight though the layer.

Bump - Simulates a relief by using a Greyscale texture interpreted as a Height map for the layer.

Normal - Distorts layer normals using an RGB image.

Dispersion Coefficient - This is the B parameter of the Cauchy dispersion model. Increasing this value increases the coloration amount and dispersion in the layer’s transmission and caustics.

Layer Opacity - Controls the layer's opacity with a Greyscale texture.