Instance Property


The color emitted as radiance from a material’s surface.


@property(nonatomic, readonly, retain) MDLMaterialProperty *emission;


A renderer (or other software component processing the material) might not treat the emission channel of a material as a light source illuminating the scene. Instead, an emission channel prevents affected areas of a surface from being darkened by other aspects of lighting and shading.

The default emission color is light gray (80% white).

See Also

Working with Shading Properties


The inherent color of the material, to be used as a modulator during shading.


The intensity of specular highlights on the material’s surface.


The index of refraction for the medium surrounding a material.


The index of refraction for a material itself.


The variation in the surface normal vectors in a material, relative to model coordinate space.


The attenuation of ambient light due to local geometry variations on a surface.


The scaling factor for ambient occlusion shading.

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This documentation contains preliminary information about an API or technology in development. This information is subject to change, and software implemented according to this documentation should be tested with final operating system software.

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