TweenLite transition


I recently started to explore TweenLite and I realized that when I turn on the auto smooting on jpegs, the quality of the fading is go way down. It is flickering a lot. I have seen websites having full browser sized images with smooth transitions.

Could you suggest me any type or principle to have a basic, non-fancy and not flickering transition (while autosmoothing is on) ?

Thank you.