anchor.diff:                                   polygonOffsetUnits: polygonOffsetUnits,
                                    alphaTest: alphaTest,
                                    overdraw: overdraw,
  -                                 visible: visible );
  +                                 visible: visible ) {
  +                           if (normalScale == null) { normalScale = new Vector2( 1.0, 1.0 ); }
  +                         }
   
   }
  
positive.code: 
                         this.bumpMap,
                         this.bumpScale: 1,
  
                         this.combine: MultiplyOperation,
                         this.reflectivity: 1,
  
negative.code: 
    var bumpMap;
    num bumpScale;
  
    var normalMap = null;
    var normalScale;
  
    var specularMap;
  
  