Transparency (Alpha) Tween

Transparency (Alpha) Tween

Flash CS4 Tutorial


How to Animate Flash Alpha Value



Alpha Tweening works great to fade in objects over time. If you are fading in an object with a black or white background you might consider a Brightness Tween because it is less processor intensive. For more information, see topic Brightness Tween.


Step One

Set your background to a shade of blue (Modify > Document)(Cmd/j (PC-Ctrl/j).

Step Two

Add an oval shape to the stage using the Oval tool (o key).

Step Three

With the oval shape selected, convert it to a Movie Symbol (F8)(Modify > Convert to Symbol).

Step Four

Click frame 20 and press F6 (Insert > Timeline > Keyframe).

Step Five

Right-click the timeline between your keyframes and choose Create Classic Tween from the pull-down menu.

Step Six

Click the keyframe at frame one, then click the oval object.

Step Seven

From Properties panel (Cmd/F3 (PC-Ctrl/F3)), Color Effect section, select Alpha from the Style menu.

Step Eight

Set Alpha to 0%.

Step Nine

To render your swf file, press Cmd/Return (PC-Ctrl/Enter).

Fading Images

Alpha Tweens work well when fading between images in Flash.

Classic and Motion Tweens

In this example you could use a Classic Tween or Motion Tween. For more information, see topics, Classic Tween or Motion Tween.


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