What you could do, is use a big square as a mask. If it has the same color as the background, and you place that square on the foreground, it can mask off anything.
So, when you fade in the square, it will look like the site itself is fading out. Reverse process and it will fade back in 
Its a simple, yet effective way of doing it. If you dont really know what I mean, just drop me a line on my email, through my profile page. Ill send you a file to show you what I mean
Posted 3 months ago











