Classes
 ClassDescription
 DepthOfFieldSprite Spherical billboard (always facing the camera) sprite object that uses a cached array of bitmapData objects as it's texture.
 DirectionalSprite Spherical billboard (always facing the camera) sprite object that uses an array of bitmapData objects defined with viewing direction vectors.
 MovieClipSprite Spherical billboard (always facing the camera) sprite object that uses a movieclip as it's texture.
 Sprite3D A graphics element used to represent objects that always face the camera
 SpriteAlign