#declare Metallic_Finish =
    finish {
        metallic
        ambient 0.1
        diffuse 0.65
        specular 0.85
        roughness 0.01
        reflection 0.45
        brilliance 1.5
    }

#declare Aluminum  =
texture {
    pigment { rgb <0.55, 0.5, 0.45> }
    finish { Metallic_Finish }
}