Alternative to tweening alpha to fade out?

[BladePoint]

In my game's title screen, I've got some display objects in the background which are all covered by a large partially transparent curtain that fills the screen. Then on top of that I have a large, detailed piece of vector artwork for my game's title. When the game starts, I fade out the title by tweening its alpha from 1 to 0 over 2 seconds or so. The problem is this gets rather choppy on low end systems, I imagine because I'm tweening a transparency over a transparency. I've tried converting my title into a bitmap, and that helps somewhat, but it's still not very smooth on a Pentium 4.

 

Are there any good, fast alternatives to the fading out effect I'm looking for? Like maybe a dissolve effect where every other pixel disappears in a checkerboard pattern, or something like that.

[Carl]

Not really sure what to offer as an alternative. alpha changes are very cpu intensive with Flash (not a GSAP issue). Might be worth testing how this effect http://kirill-poletaev.blogspot.com/2012/07/how-to-make-pixel-fade-effect-using-as3.html (demo at bottom) holds up on your older test machines.

[rob_v_5712]

Here is a suggestion - not sure if it would work or not - but maybe worth a shot.

 

You could try putting a mask over the vector art - then just alpha tween the mask.

Probably a lot less CPU intensive to alpha a simple box vs vector art.

I have not done it in a while - but I think when you alpha a mask - you have to set cacheAsBitmap flag to true for the MC as well as the MaskMC.

 

Good luck.

-R