     private var _precisionHint:String = ShaderPrecision.FULL;
 
     /**
-     * The precision of math operations performed by the shader.
+     * The precision of math operations performed by the underlying shader.
      * The set of possible values for the precisionHint property is defined 
      * by the constants in the ShaderPrecision class.
      * 


    /**
     *  Constructor.
     */ 
    public function ShaderFilter(byteCode:*=null)  
    {  

    private var _rightExtension:Number = 0.0;

    /**
     *  @copy flash.filters.ShaderFilter#rightExtension
     */
    public function get rightExtension():Number
    {
