cacheAsBitmap стояло:

Код AS3:
var vData:BitmapData = new BitmapData(cWidth, cHeight, true, 0xFFFFFF);
var m:Matrix = new Matrix();
m.translate( Math.round( cWidth / 2 ), cHeight - 3);
vData.draw(this.content, m, null, null, new Rectangle(0, 0, cWidth , cHeight ));
var nScreenShot:Bitmap = new Bitmap(vData, "auto", true);
nScreenShot.smoothing = true;
nScreenShot.cacheAsBitmap = true;
this.addChild( nScreenShot );