Why use PNG in flash games ???

[adi235eee]

1 It increases file size and big file size isn't good for web deployment.
2. i know its good for getting transparent backgrounds.but those transparent areas still do come under the hit area of the object in concern.
3.i can understand its good for applying selective masks. making things a bit easy for designers.

But why what good or what best use do we get out of using png in flash games?
i have heard its used to get a smoother background? but i doubt thats right.
i haven't been able to find some clear answers to this.

am basically looking to decrease the final swf size in games so it can get loaded faster. does that compromise quality?

[tadster]

you should only vector graphics if you want a very small file size,
i have not heard of any such png benefits

[ASWC]

you use png if you want a lossless graphic and of course transparency. There's no other use for it.