User blog comment:Roads/Picture Editing/@comment-4684185-20120430234238/@comment-3235402-20120503214839

What do you mean some of us don't have PNG files? Anyone with a recent Windows system has an included program (Paint) that can make and edit PNGs, JPGs, and more. And if you don't have Paint, are fed up with its limitations, or just have a non-Windows OS, then there are many free programs out there, like Paint.NET (what I use) that can even make still GIFs.