Enumeration Case

MDLMaterialSemanticInterfaceIndexOfRefraction

The index of refraction for the medium surrounding a material.

Declaration

MDLMaterialSemanticInterfaceIndexOfRefraction

Discussion

This value corresponds to the n1 parameter in Schlick’s equation for approximating Fresnel reflection effects. Typically, one assumes a the medium surrounding a material is air or empty space, so a value of 1.0 suffices for most uses of this semantic.