Command entry: 
Material Editor
Material/Map Browser
Maps
mental ray
Choose a mental ray shader other than a custom
3ds Max shader or a Lume shader.
The shaders provided with standard libraries from mental images are meant for use with the mental ray renderer.
NoteIn the mental image libraries, the names of base shaders have the prefix “mib_” and the names of contour shaders have the
prefix “contour_”. These prefixes don't appear in the 3ds Max user interface or in the table that follows. (Names of physics shaders have no conventional prefix.)
TipWhen you follow a link to the documentation for mental images library shaders, scroll up a bit in your browser. The links
tend to go directly to the shader's declaration code, and often there are some introductory paragraphs directly above the
code. If the link goes to the beginning of a section, scroll down instead.
