[iNils]

свойство opaqueBackground

var triangle:MovieClip = this.createEmptyMovieClip("triangle", this.getNextHighestDepth());
triangle._x = triangle._y = 50;
triangle.lineStyle(3, 0xFFCC00);
triangle.lineTo(0, 30);
triangle.lineTo(50, 0);
triangle.lineTo(0, 0);
triangle.endFill();
triangle.opaqueBackground = 0xCCCCCC;