Casting an Object Shadow
Flash CS4 Tutorial
How to Cast an Object Shadow in Flash
Shadows and lights establish dimension for your stage. By attaching a shadow to an object, you add the illusion of depth and define a light source location.
In this example we will create an object, then add a casting shadow behind the original object.
Open a new document and add a second layer to the timeline. Name the upper layer Content and the lower layer Shadow.
Select the first frame of the Content layer and add a Drawing Object to the stage.
Select the object and choose Edit > Copy (Cmd/c (PC - Ctrl/c)).
Click the first keyframe of the Shadow layer and choose Edit > Paste in Center (Cmd/v (PC - Ctrl/v).
Select your object on the Shadow layer and change the fill color to gray in the Properties panel.
With the shadow still selected, click the Free Transform tool (q key).
Scale the shadow height and skew it slightly.
Align the shadow behind the shadow casting object.
Blur is Good
To add a slight blur to the shadow, convert it to a Movie Symbol by pressing F8. Select the shadow and add a Blur filter in the Properties panel.
Bringing the Shadow Forward
Another option is to change the shadow angle and make it appear to be in front of the initial object. This creates the illusion of back lighting in the scene. You can place the shadow in front of the object by reversing the layer order.