static MaterialStruct default_materials[] = {
      { "brasss"
 	{ 0.329412, 	0.223529 ,	0.027451},
 	{ 0.780392, 	0.568627 ,	0.113725},
 	{ 0.992157, 	0.941176 ,	0.807843},
	{ 0,		0,		0},
	  0.21794872,
	  0,
      },

      { "bronze",
	{ 0.2125, 	0.1275, 	0.054},
	{ 0.714, 	0.4284, 	0.18144},
	{ 0.393548, 	0.271906, 	0.166721},
	{ 0,		0,		0},
	  0.2,
	  0,
      },

      { "bronzePolished",
	{ 0.25, 	0.148 ,		0.06475},
	{ 0.4, 		0.2368 ,	0.1036},
	{ 0.774597, 	0.458561, 	0.200621},
	{ 0,		0,		0},
	  0.6,
	  0,
      },

      { "chrome",

	{ 0.25, 	0.25, 		0.25},
	{ 0.4, 		0.4 	,	0.4},
	{ 0.774597 ,	0.774597, 	0.774597},
	{ 0,		0,		0},
	  0.6,
	  0
      }

      { "copper",
	{ 0.19125, 	0.0735 ,	0.0225},
	{ 0.7038, 	0.27048 ,	0.0828},
	{ 0.256777, 	0.137622, 	0.086014},
	{ 0,		0,		0},
	  0.1,
	  0,
      }

      { "copperPolished",
	{ 0.2295, 	0.08825, 	0.0275},
	{ 0.5508, 	0.2118, 	0.066},
	{ 0.580594, 	0.223257, 	0.0695701},
	{ 0,		0,		0},
	  0.4,
	  0,
      }

      { "gold",
	{ 0.24725, 	0.1995, 	0.0745},
	{ 0.75164, 	0.60648, 	0.22648},
	{ 0.628281, 	0.555802,	0.366065},
	{ 0,		0,		0},
	  0.4,
	  0,
      }

      { "goldPolished",
	{ 0.24725, 	0.2245, 	0.0645},
	{ 0.34615, 	0.3143, 	0.0903},
	{ 0.797357, 	0.723991,	0.208006},
	{ 0,		0,		0},
	  0.65
	  0
      }

      { "pewter",
	{ 0.105882, 	0.058824, 	0.113725},
	{ 0.427451, 	0.470588, 	0.541176},
	{ 0.333333,	0.333333, 	0.521569},
	{ 0,		0,		0},
	  0.076923078,
	  0,
      }

      { "silver",
	{ 0.19225, 	0.19225, 	0.19225},
	{ 0.50754, 	0.50754, 	0.50754},
	{ 0.508273, 	0.508273, 	0.508273},
	{ 0,		0,		0},
	  0.4,
	  0,
      }

      { "silverPolished",
	{ 0.23125, 	0.23125, 	0.23125},
	{ 0.2775, 	0.2775, 	0.2775},
	{ 0.773911, 	0.773911, 	0.773911},
	{ 0,		0,		0},
	  0.7,
	  0,

      }

};