code: function postDraw(renderer) {
           if (typeof this.mask !== "undefined") {
             renderer.clearMask();
           }
  
           if (typeof this.tint !== "undefined") {
             renderer.clearTint();
           } // restore the context
  
  
           renderer.restore();
         }
docs: restore the rendering context after drawing. <br>
  automatically called by the game manager {@link me.game}
  @name postDraw
  @memberOf me.Renderable.prototype
  @function
  @protected
  @param {me.CanvasRenderer|me.WebGLRenderer} renderer a renderer object