Metal shader in 3ds max is used to create metallic surfaces and variety of organic looking materials. Metal shader has a distinctive highlights. It calculates its own specular color which can vary between its diffuse color and color of light. There is no option to set the specular color for metal shader.
How to set a material’s Shading type
Shader Basic parameters
Renders the material in wireframe mode. You can set the size of the wire in Extended Parameters.
Makes the material 2-sided. Applies the material to both sides of selected faces.
Applies the material to the faces of the geometry. If the material is a mapped material, it requires no mapping coordinates. The map is automatically applied to each facet of the object.
Renders each face of a surface as if it were flat.
Parameters of Metal shader in 3ds Max