В нижеприведенном коде bmp_mc - уже "сглаженная" картинка.

Код:
var src:String = "http://img.jpg";
var container:MovieClip = createEmptyMovieClip("container", getNextHighestDepth());
var mcLoader:MovieClipLoader = new MovieClipLoader();
var loadListener:Object = new Object();
loadListener.onLoadInit = function(target_mc:MovieClip) {
var tmpBmp:BitmapData = new BitmapData (target_mc._width,target_mc._height);
tmpBmp.draw(target_mc);
target_mc.removeMovieClip();
var bmp_mc:MovieClip = createEmptyMovieClip("bmp_mc", getNextHighestDepth());
bmp_mc.attachBitmap(tmpBmp, 0, "always", true);
};
mcLoader.addListener(loadListener);
mcLoader.loadClip(src, container);