[aQuestion]

Как вариант:

import flash.display.Shape
import flash.display.Sprite
import flash.filters.DropShadowFilter;
import flash.filters.BitmapFilterQuality;

var foo:Number = 7;
var sh2:Shape = new Shape ();
with(sh2.graphics){
	beginFill(0,1);
	moveTo(100 - foo, 100 - foo);
	lineTo(100 + 100/2, 100); lineTo (100 + 100 + foo, 100 -foo);
	lineTo(100 + 100, 100 + 100/2); lineTo (100 + 100 + foo, 100 + 100 + foo);
	lineTo(100 + 100/2, 100 + 100); lineTo (100 - foo, 100 + 100 + foo);
	lineTo(100, 100 + 100/2);
	endFill();
}

var gf:DropShadowFilter=new DropShadowFilter();
gf.color=0x0000FF;
gf.blurX=gf.blurY=15
gf.quality=10;
gf.hideObject = true;
gf.distance = 0;
gf.strength = 1.5;
sh2.filters=[gf];
addChild(sh2);

var sh:Shape=new Shape();
with(sh.graphics){
	beginFill(0,1);
	drawRect(100,100,100,100);
	endFill();
}
addChild(sh);