Curmudgeon

As far as I know (and I've only been around a month or so) there's no tool like that. When I did the one below, I simply used the ellipse & rectangle selects. Just duplicated the original picture, erased the body of the car from one, and the tires and shadow from the other, then panelled the one layer up. You can pretend you have hydraulics, and get the following:

after my post, I decided to eat lunch, and give my brain some food...then it woke up and I felt like a tard at least I know my gazintas!

if that is indeed the case, Paint.NET must be 16-bit color, as that yields 65,535 colors, which is the number of combinations you can get with a 0~255 scale on each of the Red, Green and Blue colors

I whipped this up, and didn't know if it was close to what you were looking for If so, PM me and I can fill you in on what I did...very simple

the drop shadow plugin won't be in any folder, if you are looking for it in one. the attached picture shows the location

maybe something like this?