#declare Rusty_Iron =
texture {
    pigment {
        granite
        color_map {
            [0.0 rgb <0.42, 0.20, 0.20>]
            [0.5 rgb <0.50, 0.50, 0.02>]
            [0.6 rgb <0.60, 0.20, 0.20>]
            [0.6 rgb <0.30, 0.20, 0.20>]
        }
    }
    finish { ambient 0.2 diffuse 0.6 }
    normal { wrinkles 1 scale 0.1 }
}