mental ray Material
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Material/Map Browser mental ray

Note: The mental ray material appears in the Browser only if the mental ray renderer is the currently active renderer.

The mental ray material lets you create a material exclusively for use by the mental ray renderer. The mental ray material has components for the surface shader, and for the other nine optional shaders that make up a material in mental ray.

ImportantYou must assign a shader to the material's Surface component. Otherwise, the mental ray material will not be visible when you render.