AttributeBegin
    Pattern "PxrPrimvar" "PxrPrimvar1"
        "string varname" ["Cs"]
        "string type" ["color"]
        "string coordsys" [""]
        
    Bxdf "PxrSurface" "PxrSurface1"
        "float diffuseGain" [1.0]
        "reference color diffuseColor" ["PxrPrimvar1:resultRGB"]
        "float diffuseRoughness" [0.0]
        "normal diffuseBumpNormal" [0 0 0]
        "int diffuseDoubleSided" [0]
        "int diffuseBackUseDiffuseColor" [1]
        "color diffuseBackColor" [0.18 0.18 0.18]
  
        "color specularFaceColor" [0 0 0]
        "color specularEdgeColor" [0 0 0]
    Basis "b-spline" 1 "b-spline" 1
    Curves "cubic" [8] "nonperiodic"
            "P" [0 0 0   0 0 0   0 0 0
            1 2 0     1.5 2 0
            2 1 0     2 1 0   2 1 0]
            "constantwidth" [0.125]
            "Cs" [0.090 0.501 0.090   0.090 0.501 0.090
            0.090 0.501 0.090   0.090 0.501 0.090
            1 1 0   1 1 0]
AttributeEnd