	AttributeBegin
		Declare "blackcolor" "color"
		Declare "Kd" "float"
		Declare "Ka" "float"
	 	Color [.8 .85 .95]
	 	Surface "RCChecker" 
			"blackcolor" [.5 .585 .85]
			"Kd" .375
			"Ka" .0675
	 	TransformBegin
			Translate 0 -3 0
			Rotate 90 1 0 0 
			Scale 10.5 11 1
	 		Patch "bilinear" "P" 
	 					[	-1 -1 0   1 -1 0 
	 					 	-1  1 0   1  1 0  ]
	 	TransformEnd
	AttributeEnd
